In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

Q: Context: At the Northern Ireland Trophy, he beat Robert Stephen 5–0 before falling to David Gilbert 0–5 in qualifying. Link Information: 

Robert Stephen (born 27 June 1984) Answer: David Gilbert

A: Which of the players Liang Wenbo faced in the qualifying event at the Northern Ireland Trophy was older?
****
Q: Context: Tasker was a color commentator for CBS football telecasts (with Andrew Catalon (play-by-play) and Steve Beuerlein (the other color commentator) starting in 2014). Link Information: none Answer: none

A: Which of Tasker's commentary colleagues at CBS is older?
****
Q: Context: After brief post-doc positions at SLAC and Caltech Link Information: none Answer: none

A:
Of the first two post-doc positions John Ellis held, which company did he work for the longest?
****