Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Ex Input:
In 1993, Luis Miguel's fifth studio album, Aries, was released, which won him that year's Grammy Award for Best Latin Pop Album.

Ex Output:
What award was Luis Miguel nominated for?

Ex Input:
Dreams in a Drawer (Italian: I sogni nel cassetto) is a 1957 Italian romantic drama film written and directed by Renato Castellani and starring Lea Massari.

Ex Output:
The main director of Dreams in a Drawer was who?

Ex Input:
Christianson syndrome (CS) is caused by mutations in SLC9A6 and is characterized by severe intellectual disability, absent speech, microcephaly, ataxia, seizures, and behavioral abnormalities. The clinical phenotypes of CS and Angelman syndrome (AS) are similar. Differentiation between CS and AS is important in terms of genetic counseling. We report on two children with CS and confirmed mutations in SLC9A6 focusing on neuroimaging findings and review the available literature. Cerebellar atrophy (CA) occurs in approximately 60% of the patients with CS and develops after the age of 12 months. Hyperintense signal of the cerebellar cortex (CbC) is less common, and may be diffuse, patchy, or involve only the inferior part of the cerebellum and is best seen on coronal fluid attenuation inversion recovery images. CA and CbC-hyperintensity are not neuroimaging features of AS. In a child with the phenotype of AS, CA and/or CbC-hyperintensity are rather specific for CS and should prioritize sequencing of SLC9A6.

Ex Output:
Mutation of which gene is implicated in the Christianson syndrome?