This question already has an answer here:
If I have two cards called Sin Collector in hand and I play my first, Sin Collector (A). I use its triggered ability.
"When Sin Collector enters the battlefield, target opponent reveals his or her hand. You choose an instant or sorcery card from it and exile that card."
Now, I play Sin Collector (B), I use B's triggered ability.
But now my question. Does Sin Collector (A)'s ability trigger again as well? 'Sin Collector' entered the battlefield again, right?