Question: What is the main base of the airline co-founded by John Nicolaas Block?

Related documents: [0]  [DOC] Transavia, legally incorporated as "Transavia Airlines C.V." and formerly branded as "transavia.com", is a Dutch low-cost airline and a wholly owned subsidiary of KLM and therefore part of the Air France-KLM group. Its main base is Amsterdam Airport Schiphol and has further bases at Rotterdam The Hague Airport, Munich Airport and Eindhoven Airport. Transavia maintains Transavia France as its French subsidiary. [END] 
[1]  [DOC] Johan Nicolaas Block (May 18, 1929, Amsterdam – April 11, 1994) was a Dutch aviation pioneer. He was the co-founder of Martinair, founder of Transavia and Air Holland. [END]  
Answer: Amsterdam Airport Schiphol
Amsterdam Airport Schiphol