system
sentimental: I don't want to throw away my son's old trophies. 
gpt
My son just left for college and I don't want to throw away his old comic books and trophies. 
gpt
Aww that's really sweet. I understand being sentimental about that sort of stuff. Do you feel like you have to?
gpt
Yes I am really attached to his stuff. He told me get rid of his old stuff but I think I will let him know I just can't do it. 
gpt
You should just keep it for now. He may think that stuff is corny now, but later in life he will be glad you kept it.