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

Example Input: Heme is critical for a variety of cellular processes, but excess intracellular heme may result in oxidative stress and membrane injury. Feline leukemia virus subgroup C receptor (FLVCR1), a member of the SLC49 family of four paralogous genes, is a cell surface heme exporter, essential for erythropoiesis and systemic iron homeostasis. Disruption of FLVCR1 function blocks development of erythroid progenitors, likely due to heme toxicity. Mutations of SLC49A1 encoding FLVCR1 are noted in patients with a rare neurodegenerative disorder: posterior column ataxia with retinitis pigmentosa. FLVCR2 is highly homologous to FLVCR1 and may function as a cellular heme importer. Mutations of SLC49A2 encoding FLVCR2 are observed in Fowler syndrome, a rare proliferative vascular disorder of the brain. The functions of the remaining members of the SLC49 family, MFSD7 and DIRC2 (encoded by the SLC49A3 and SLC49A4 genes), are unknown, although the latter is implicated in hereditary renal carcinomas. SLC48A1 (heme responsive gene-1, HRG-1), the sole member of the SLC48 family, is associated with the endosome and appears to transport heme from the endosome into the cytosol.
Example Output: Which SLC family is FLVCR1 a member of?

Example Input: The 80-string koto (or hachijugen) was an invention of Japanese composer Michio Miyagi which appeared In 1923.
Example Output: By whom was 80-string koto discovered?

Example Input: Just under two years after announcing his retirement, Krzysztof Kieslowski died on 13 March 1996 at age 54 during open-heart surgery following a heart attack, and was interred in Powazki Cemetery in Warsaw.
Example Output:
The final resting place of Krzysztof Kieślowski is at what cemetery?