Sentence:The young goshawks seemed a bit fazed by all the cover, and never really got onto the rabbits, so we moved out to the field and Roy worked his pointer until we found a youngish [e1]covey[/e1] of [e2]partridges[/e2].
 e1: covey. 
 e2 : partridges.
Answer: Member-Collection(e2,e1)