We met at Nick's house before going out to eat.
Proper Noun=Nick's
Common noun=house
Byron Elementay School has a day off tomorrow.
Proper noun= Bryon Elementary School
Common noun=tomorrow
They studied the pictures of Venus.
Proper Noun=Venus
Common Noun=They
Is this correct?
In #2 the common noun is day.... tomorrow tells when and is an adverb.
#1 is fine
#3 Venus is a proper noun
However, "they" is a pronoun.
So, what would the common noun be?