Sentence:It found the net aggregate economic benefit to native-born Americans from the enormous [e1]influx[/e1] accidentally triggered by the 1965 [e2]immigration[/e2] is nugatory-less than $10 billion a year, in an economy of $10 trillion.
 e1: influx. 
 e2 : immigration.
Answer: Cause-Effect(e2,e1)