Question: PM tried to buy the Belin biscuit company from RJR Nabisco two years ago.

American tobacco companies began to diversify production.
Answer: no
Question: Scientists had thought all gamma-ray bursts had a standard energy.

The scientists had thought that all explosions gamma the ray have a standard energy.
Answer: no
Question: Edwin Hubble is recongized as having been one of the foremost astronomers of the modern era.

Edwin Hubble was an astronomer.
Answer:
yes