About plural: "which is" or "which are"?
Ohhhh, I'm not sure, which one is correct:
(1) The thing has two parts (X and Y) which is from two different sources: source A and source B.
(2) The thing has two parts (X and Y) which are from two diferent souce: source A and source B.
sorry, it's a editing error, I wanted to writing as:
(1) The thing has two parts (X and Y) which is from two different source: source A and source B.
(2) The thing has two parts (X and Y) which are from two diferent souces: source A and source B.