this 1 sentence composition

1. Mary told Cathy all about herself.

We tend to assume that the subject(Mary) is the antecedent. However, Mary could conceivably tell Cathy all about Cathy, if, for instance, she knows a lot about Cathy and wants to prove it. In cases like this, how can we definitively establish which NP is intended as the antecedent? The best way is to examine the context of the sentence, which usually makes clear the correct choice.

Q) I modified the underlined part into one sentence. Does it sound good?
=> The best way to definitively establish which NP is intended as the antecedent is to examine the context of the sentence, which usually makes clear the correct choice.