3360
Bacteria in the large intestine perform many important functions for humans , including breaking down and aiding in the absorption of fermentable fiber , stimulating cell growth , repressing the growth of harmful bacteria , training the immune system to respond only to pathogens , producing vitamin B , and defending against some infectious diseases .
 food: vitamin B
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 food: vitamin B