Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

[EX Q]: Context: The Caretaker Cabinet of Panagiotis Pikrammenos was sworn in on May 17, 2012 when an inconclusive election on May 6, 2012 resulted in a hung parliament. 
 Question: What year did Caretaker Cabinet of Panagiotis Pikrammenos end?
[EX A]: 2012

[EX Q]: Context: The apolipoprotein E type 4 allele is a susceptibility gene for late-onset Alzheimer's disease. Apolipoprotein E is found in neurons, some of which contain paired helical filaments made of the microtubule-associated protein tau. Previous studies have demonstrated that the apoE3 isoform, but not the apoE4 isoform, binds tau with high avidity. Because the microtubule-associated protein MAP2c also effects microtubule assembly and stability, we examined interactions between apoE isoforms and MAP2c. Similar to the tau-binding results, apoE3, but not apoE4, bound MAP2c. Binding was detectable down to 10(-9) M MAP2c and 10(-8) M apoE3. Isoform-specific interactions of apoE with the microtubule-associated proteins MAP2c and tau might affect intracellular maintenance of microtubules and could contribute to a time-dependent pathogenesis of Alzheimer's disease. 
 Question: Which ApoE isoform is associated with atherosclerosis and Alzheimer's disease?
[EX A]: apoe4 isoform

[EX Q]: Context: ''The Lighthouse's Tale'' is a song by progressive bluegrass band Nickel Creek, taken from their debut album, Nickel Creek, released in 2001. 
 Question: Who is the performer of The Lighthouse's Tale?
[EX A]:
nickel creek