6635
Caffeine content was significantly ( p <= 0 . 05 ) lower in products from the purple leaf coloured cultivars than in those from the green leaf coloured tea cultivars .
 Chemical: Caffeine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Caffeine