Problem: Does "This dates from the mid-19th century when the southwestern area of Westchester County west of the Bronx River, was incorporated into New York City and known as the Northside." answer the question "When was the Bronx added to NYC?"

A: yes

Problem: Does "The battle of Iwo Jima ("Operation Detachment") in February 1945 was one of the bloodiest battles fought by the Americans in the Pacific War." answer the question "How many square miles is the island of Iwo Jima?"

A: no

Problem: Does "Without predation, herbivores began to over-graze many woody browse species, affecting the area's plant populations." answer the question "Why were plant populations affected after wolves were eliminated from Yellowstone?"

A:
yes