1752
we have eyewitnesses to his orders of execution of hundreds of people in 1991 during the shiite muslim uprising .
 people: person; his: agent
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: execute 
  Option: person, agent, place 
Text: {0} 
Answer:
 people: person; his: agent