Question: If "This book introduced Shakespeare to Ovid; it was a major influence on his writing.", can we conclude that "It was a major influence on Ovid's writing."?
Answer: no

Question: If "Sid explained his theory to Mark but he couldn't convince him.", can we conclude that "Sid couldn't convince him."?
Answer: yes

Question: If "The painting in Mark's living room shows an oak tree. It is to the right of the bookcase.", can we conclude that "The oak tree is to the right of the bookcase."?
Answer:
no