Context: Canada has the world's largest deposit of natural bitumen in the Athabasca oil sands and Canadian First Nations along the Athabasca River had long used it to waterproof their canoes. In 1719, a Cree Indian named Wa-Pa-Su brought a sample for trade to Henry Kelsey of the Hudson’s Bay Company, who was the first recorded European to see it. However, it wasn't until 1787 that fur trader and explorer Alexander MacKenzie saw the Athabasca oil sands and said, "At about 24 miles from the fork (of the Athabasca and Clearwater Rivers) are some bituminous fountains into which a pole of 20 feet long may be inserted without the least resistance."

Question: What country has the largest deposits of bitumen?
Answer: Canada

Question: For what  did Canadian natives use asphalt as a waterproofing material?
Answer: canoes

Question: Who was the first European trader to see asphalt?
Answer: Henry Kelsey

Question:  For what trading company did Kelsey work?
Answer: Hudson’s Bay Company

Question: Who was the first European to see the Athabascan oil sands?
Answer: Alexander MacKenzie

Question: Which country has North America's largest deposit of naturally occurring bitumen?
Answer: Unanswerable

Question: Canada is home to the world's smallest deposit of what?
Answer: Unanswerable

Question: Where is the world's smallest natural bitumen deposit located?
Answer: Unanswerable

Question: In what year did Athabasca see the oil sands? 
Answer: Unanswerable

Question: Alexander MacKenzie was a oil trader and saw the oil sands in what year?
Answer: Unanswerable