55488
Before the 1790 s , slave labor was primarily employed in growing rice , tobacco , and indigo , none of which were especially profitable anymore .
 plant: indigo
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: indigo 
Answer:
 plant: indigo