What are the keywords in the following sentence? a student gets congratulated by his friends after his graduation ceremony on thursday .
ceremony, friend, thursday

What are the keywords in the following sentence? The motorcycle is part of a parade.
motorcycle, parade, part

What are the keywords in the following sentence? the building was one of those structures sold recently as part of the project .
building, part, structure

What are the keywords in the following sentence? A piece of lasagna with cheese and vegetable.
cheese, piece, vegetable