Sentence:Thousands of multicoloured fish populate the lagoon and the fallings of the passes; the large barracudas are scouting dangerously, and their cousins the "becunes" [e1]fish[/e1] gather in immense [e2]shoal[/e2], like the"carangues"playing in the sun, as squadrons driving out of their territory the too daring small sharks.
 e1: fish. 
 e2 : shoal.
Answer: Member-Collection(e1,e2)