67687
The name was proposed by Ingrid van Houten-Groeneveld who along with Cornelis Johannes van Houten and Tom Gehrels discovered the asteroid on September 24 , 1960 .
 person: Ingrid van Houten-Groeneveld; person: Cornelis Johannes van Houten; person: Tom Gehrels
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: Ingrid van Houten-Groeneveld, Cornelis Johannes van Houten, Tom Gehrels 
Answer:
 person: Ingrid van Houten-Groeneveld; person: Cornelis Johannes van Houten; person: Tom Gehrels