Problem: Does "The former two books were aimed exclusively at professional mathematicians, while the latter book was intended for a larger audience, covering the history of mathematics and its philosophical foundations." answer the question "What is the significance of Principia Mathematica currently?"

A: no

Problem: Does "The complete technical disclosure of the Columbia LP by Peter C. Goldmark, Rene' Snepvangers and William S. Bachman in 1949 made it possible for a great variety of record companies to get into the business of making long playing records." answer the question "When was the business booming for do it yourself sound fanatics?"

A: yes

Problem: Does "It was the largest and most important economic depression in the 20th century, and is used in the 21st century as an example of how far the world's economy can fall." answer the question "What changed worldwide property drasrically?"

A:
no