input question: Is it true that "Sid couldn't convince him." if "Sid explained his theory to Mark but he couldn't convince him." is true?
output answer: yes

input question: Is it true that "The door of the shop closed after Mark." if "Mark heard Steve's feet going down the ladder. The door of the shop closed after him. He ran to look out the window." is true?
output answer: no

input question: Is it true that "The door of the shop closed after Steve." if "Mark heard Steve's feet going down the ladder. The door of the shop closed after him. He ran to look out the window." is true?
output answer: yes

input question: Is it true that "The shark had better get away to safety fast!" if "Look! There is a shark swimming right below that duck! It had better get away to safety fast!" is true?
output answer:
no