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.

Context: . Real executive power vests in a Union Council of Ministers Link Information: none Answer: none
How many members comprise the council in which real executive power is vested?

Context: In 1979 they released the track, "Some Day" for the compilation album, Home Grown Volume One; "Some Day" was cowritten with Tony Backhouse Link Information: Tony Backhouse (born 1947) Answer: 32
What age was Tony Backhouse the year that he cowrote "Some Day"?

Context: Shake It Off" became her third number-one song there, following her 2008 country crossover hit single "Love Story" and her 2013 hit "I Knew You Were Trouble", Link Information:  It was also a commercial success, selling over 18 million copies worldwide Answer: Love Story

Of her 2008 country crossover hit single and her 2013 hit, which sold more copies?