19592
It is used as an agent of biological pest control against noxious knapweeds , particularly spotted knapweed ( " Centaurea maculosa " ) , squarrose knapweed ( " Centaurea virgata " ssp .
 plant: knapweeds
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: knapweeds 
Answer:
 plant: knapweeds