5802
By ingesting a large amount of plants in the genus " Asclepias " , primarily milkweed , monarch caterpillars are able to sequester cardiac glycosides , or more specifically cardenolides , which are steroids that act in heart-arresting ways similar to digitalis .
 plant: Asclepias
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:
 plant: Asclepias