Como pegar parte de uma string

Galera meu problema é o seguinte tenho a seguinte lista

PHP

$tudo = "keywordHandler:addKeyword({'sell', 'bronze amulet'},         tradeItem, {itemid = 2172, cost = 100})

keywordHandler:addKeyword({'sell', 'crystal necklace'},         tradeItem, {itemid = 2125, cost = 150})

keywordHandler:addKeyword({'sell', 'dragon necklace'},       tradeItem, {itemid = 2201, cost = 250})

keywordHandler:addKeyword({'sell', 'elven amulet'},             tradeItem, {itemid = 2198, cost = 500})

keywordHandler:addKeyword({'sell', 'garlic necklace'},       tradeItem, {itemid = 2199, cost = 250})

keywordHandler:addKeyword({'sell', 'golden amulet'},         tradeItem, {itemid = 2130, cost = 3500})

keywordHandler:addKeyword({'sell', 'platinum amulet'},       tradeItem, {itemid = 2171, cost = 2500})

keywordHandler:addKeyword({'sell', 'ruby necklace'},         tradeItem, {itemid = 2133, cost = 1000})

keywordHandler:addKeyword({'sell', 'protection amulet'},        tradeItem, {itemid = 2200, cost = 350})

keywordHandler:addKeyword({'sell', 'silver amulet'},         tradeItem, {itemid = 2170, cost = 50})

keywordHandler:addKeyword({'sell', 'silver necklace'},       tradeItem, {itemid = 2132, cost = 250})

keywordHandler:addKeyword({'sell', 'stone skin amulet'},        tradeItem, {itemid = 2197, cost = 1500})

keywordHandler:addKeyword({'sell', 'strange symbol'},           tradeItem, {itemid = 2319, cost = 500})

keywordHandler:addKeyword({'sell', 'strange talisman'},         tradeItem, {itemid = 2161, cost = 400})

keywordHandler:addKeyword({'sell', 'scarab amulet'},         tradeItem, {itemid = 2135, cost = 1000})

keywordHandler:addKeyword({'sell', 'axe ring'},                 tradeItem, {itemid = 2208, cost = 400})

keywordHandler:addKeyword({'sell', 'club ring'},             tradeItem, {itemid = 2209, cost = 400})

keywordHandler:addKeyword({'sell', 'sword ring'},               tradeItem, {itemid = 2207, cost = 400})

keywordHandler:addKeyword({'sell', 'dwarven ring'},             tradeItem, {itemid = 2213, cost = 25})

keywordHandler:addKeyword({'sell', 'power ring'},               tradeItem, {itemid = 2166, cost = 400})

keywordHandler:addKeyword({'sell', 'time ring'},             tradeItem, {itemid = 2169, cost = 1000})

keywordHandler:addKeyword({'sell', 'wedding ring'},             tradeItem, {itemid = 2121, cost = 500})

keywordHandler:addKeyword({'sell', 'ring of healing'},       tradeItem, {itemid = 2214, cost = 2000})

keywordHandler:addKeyword({'sell', 'crystal ring'},             tradeItem, {itemid = 2124, cost = 2000})

keywordHandler:addKeyword({'sell', 'energy ring'},           tradeItem, {itemid = 2167, cost = 1000})

keywordHandler:addKeyword({'sell', 'life ring'},             tradeItem, {itemid = 2168, cost = 800})

keywordHandler:addKeyword({'sell', 'golden ring'},           tradeItem, {itemid = 2179, cost = 15000})

keywordHandler:addKeyword({'sell', 'stealth ring'},             tradeItem, {itemid = 2165, cost = 1000})

keywordHandler:addKeyword({'sell', 'might ring'},               tradeItem, {itemid = 2164, cost = 5000})

keywordHandler:addKeyword({'sell', 'ring of the skies'},        tradeItem, {itemid = 2357, cost = 30000})

keywordHandler:addKeyword({'sell', 'small amethyst'},   tradeItem, {itemid = 2150, cost = 200, stackable = true})

keywordHandler:addKeyword({'sell', 'small diamond'},    tradeItem, {itemid = 2145, cost = 300, stackable = true})

keywordHandler:addKeyword({'sell', 'small emerald'},    tradeItem, {itemid = 2149, cost = 250, stackable = true})

keywordHandler:addKeyword({'sell', 'talon'},    tradeItem, {itemid = 2151, cost = 500, stackable = true})

keywordHandler:addKeyword({'sell', 'small ruby'},               tradeItem, {itemid = 2147, cost = 250, stackable = true})

keywordHandler:addKeyword({'sell', 'small sapphire'},   tradeItem, {itemid = 2146, cost = 250, stackable = true})

keywordHandler:addKeyword({'sell', 'black pearl'},           tradeItem, {itemid = 2144, cost = 160, stackable = true})

keywordHandler:addKeyword({'sell', 'white pearl'},           tradeItem, {itemid = 2143, cost = 280, stackable = true})

keywordHandler:addKeyword({'sell', 'blue gem'},                 tradeItem, {itemid = 2158, cost = 250})

keywordHandler:addKeyword({'sell', 'big ruby'},                 tradeItem, {itemid = 2156, cost = 500})

keywordHandler:addKeyword({'sell', 'big emerald'},           tradeItem, {itemid = 2155, cost = 500})

keywordHandler:addKeyword({'sell', 'yellow gem'},               tradeItem, {itemid = 2154, cost = 150})

keywordHandler:addKeyword({'sell', 'violet gem'},               tradeItem, {itemid = 2153, cost = 150})";

Preciso pegar o que fica entre {'sell', 'O QUE EU QUERO'}, exemplo:

keywordHandler:addKeyword({'sell', 'violet gem'},

Gostaria de obter violet gem o problema é que se fosse uma linha só eu conseguiria obter isto, mas como são várias nao sei como fazer alguem poderia mi ajudar?

Abraço,

mmb