Problem: Text: A California hurricane is a tropical cyclone that affects the state of California. Usually, only the remnants of tropical cyclones affect California. Since 1900, only two tropical storms have hit California, one by direct landfall from offshore, another after making landfall in Mexico.

Question: has california ever been hit by a hurricane?
A: yes

Problem: Text: The liver and liver products (such as cod liver oil) of fish and many animals (such as seals and whales) contain omega-3, but also the active form of vitamin A. At high levels, this form of the vitamin can be dangerous (Hypervitaminosis A).

Question: does fish oil have vitamin a in it?
A: yes

Problem: Text: In mathematical analysis, the rational numbers form a dense subset of the real numbers. The real numbers can be constructed from the rational numbers by completion, using Cauchy sequences, Dedekind cuts, or infinite decimals.

Question: is every rational number is a real number?
A:
yes