Question: Last year the DNC fully identified only 65 percent of its donors.
The remaining percent refused to be identified.

Answer: it is not possible to tell

Question: Nelson also carried out what was in effect a coup d'etat at Rockefeller Center, forcing out the retainers loyal to his father so that he could take over himself.
Nelson went through Rockefeller Center and fired anyone loyal to his father, but bought them lunch first.

Answer: it is not possible to tell

Question: It referred to a man's body found near the docks in New York about three weeks ago.
Three weeks ago a body had been found near the New York docks.

Answer:
yes