Problem: The Boulton Paul Balliol and Sea Balliol were monoplane military advanced trainer aircraft built for the Royal Air Force (RAF) and the Royal Navy Fleet Air Arm (FAA) by Boulton Paul Aircraft. Developed in the late 1940s the Balliol was designed to replace the North American Harvard trainer and used the Rolls-Royce Merlin engine, with the Sea Balliol a naval version for deck landing training.

Based on the paragraph above can we conclude that "The Boulton was used for 20 years."?

A: It's impossible to say

Problem: Morten Johannes Lauridsen (born February 27, 1943) is an American composer. A National Medal of Arts recipient (2007), he was composer-in-residence of the Los Angeles Master Chorale (19942001) and has been a professor of composition at the University of Southern California Thornton School of Music for more than 40 years.

Based on the paragraph above can we conclude that "Morten Johannes Lauridsen learned some music from his parents."?

A: It's impossible to say

Problem: Gotz Freiherr von Houwald (May 13, 1913 August 16, 2001) was a German diplomat, historian and ethnographer. He was born in Posen and died in Bonn. His full name was Maximilian Otto Gustav Albrecht Hubert Wilhelm Gotz-Dieter Freiherr von Houwald.Gotz-Dieter von Houwald's parents were Albrecht Freiherr von Houwald und Helene Grafin von Carmer.

Based on the paragraph above can we conclude that "Gotz Freiherr von Houwald shook hands with Obama."?

A:
It's impossible to say