Question: What province is the airport at which Groninger Luchtvaart Maatschappij aimed to start operations located in?
Sentence (from "Groninger Luchtvaart Maatschappij"): The Groninger Luchtvaart Maatschappij (GLM) was a Dutch start-up airline which aimed to start operations in 2013 from Groningen Airport Eelde with a twice daily service to London Southend Airport.
Relevant evidence: Yes