Problem: Does "It has been possible to teach a migration route to a flock of birds, for example in re-introduction schemes." answer the question "What did they use to teach birds a migration route?"

A: no

Problem: Does "Walker retired in 1990 due to health, and Michael Dell hired Morton Meyerson, former CEO and president of Electronic Data Systems to transform the company from a fast-growing medium-sized firm into a billion-dollar enterprise." answer the question "What year did Michael Dell bring in Lee Walker to the company?"

A: no

Problem: Does "It was unclear what would happen to the empire on Henry's death." answer the question "When was John born?"

A:
no