Did Helen have a bicycle 5 years ago?
Yes, she did.
Did Matt have a bicycle 5 years ago?
No, he didn't.
Did Helen have a guitar 10 years ago?
No, she didn't.
Did Matt have a guitar 10 years ago?
Yes, he did.
Did Helen have a cat 2 years ago?
Yes, she did.
Did Matt have a cat 2 years ago?
No, he didn't.