Sentence:Specifications of electric [e1]heater[/e1] [e2]thermostats[/e2] include temperature ranging from 50 degrees F to 80 degrees F, current ranging from 19 A to 22 A, & voltage ranging from 120 V to 277 V.
 e1: heater. 
 e2 : thermostats.
Answer: Component-Whole(e2,e1)