QUESTION:
The glass hit the floor and it broke.
Who is "it"?

ANS:
The glass

QUESTION:
Technician Stepanic crafted advanced opticals for Leforge, but he would still prefer to see without such devices.
Who is "he"?

ANS:
Leforge

QUESTION:
Iphones are selling more than androids because they are trendy.
Who is "they"?

ANS:
Iphones

QUESTION:
John asked the scientist what he was working on.
Who is "he"?

ANS:
the scientist