TASK DEFINITION: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
PROBLEM: The Stadion pod Dubnom is an all-seater football stadium situated in Zilina, Slovakia, which is the home of MSK Zilina.

SOLUTION: What team uses Stadion pod Dubnom?

PROBLEM: Fafhrd and the Gray Mouser are two sword-and-sorcery heroes appearing in stories written by American author Fritz Leiber.

SOLUTION: Who is the author of Fafhrd and the Gray Mouser?

PROBLEM: Transgenic mice over-expressing a mutated form of the human amyloid precursor protein (APP, 695 isoform) bearing a mutation associated with Alzheimer's disease (V642I, so-called London mutation, hereafter APPLd2) and wild-type controls were studied at age periods (3 and 10 months) prior to the overt development of neuritic amyloid plaques. Both 3- and 10-month-old APPLd2 mice had reflex eyelid responses like those of controls, but only younger mice were able to acquire a classical conditioning of eyelid responses in a trace paradigm. In vitro studies on hippocampal slices showed that 10-month-old APPLd2 mice also presented deficits in paired-pulse facilitation and long-term potentiation, but presented a normal synaptic activation of CA1 pyramidal cells by the stimulation of Schaffer collaterals. It is proposed that definite functional changes may appear well in advance of noticeable structural alterations in this animal model of Alzheimer's disease, and that specific learning tasks could have a relevant diagnostic value.

SOLUTION:
Which disease the London mutation involved in?