[Q]: Sebo Walker (born April 28, 1988) is a professional skateboarder and artist living in Venice, Los Angeles who is best known for winning the Red Bull Manny Mania Amateur U.S. Championships in 2011 and for living in his Chrysler Town and Country van in West LA from 20102015. Venice is not as popular with artists as it used to be.
[A]: It's impossible to say

[Q]: Eucommia jeffersonensis is an extinct species of flowering plant in the family Eucommiaceae. It is known from a fossil fruit found in latest Eocene deposits of Oregon, United States. "E.jeffersonensis" is one of five described fossil species from North America assigned to the modern genus "Eucommia". The other species are "E.constans", "E.eocenica", "E.montana", and "E.rolandii". E. jeffersonensis" is not the only described fossil species from North America assigned to the modern genus "Eucommia".
[A]: Yes

[Q]: Mike Bossy the Scoring Machine is a pinball machine manufactured by Game Plan, Inc. as a prototype in 1982, featuring New York Islanders hockey star Mike Bossy. There was only one machine produced. Designed by Ed Cebula, it was the only professionally endorsed pinball machine produced by Game Plan. The New York Islanders officially licensed the pinball machine.
[A]: It's impossible to say

[Q]: The Dr. Samuel D. Mercer House was built in 1885 at 3920 Cuming Street in the historic Walnut Hill neighborhood of Omaha, Nebraska, United States. Samuel Mercer was the chief surgeon of the Union Pacific Railroad, and the founder of Omaha's first hospital. Dr Mercer worked for the Railroad that he loved
[A]:
It's impossible to say