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 Input:
Context: General Sir Alfred Dudley Ward GCB, KBE, DSO (27 January 1905--28 December 1991), was a senior officer of the British Army who saw service during World War II and later became Governor of Gibraltar.
Question: What branch was Alfred Dudley Ward part of?

Ex Output:
british army

Ex Input:
Context: The Great Red Spot is a persistent anticyclonic storm on the planet Jupiter, 22 south of the equator, which has lasted for at least 186 years and possibly as long as 351 years or more.
Question: On what celestial body is Great Red Spot located?

Ex Output:
jupiter

Ex Input:
Context: The gene encoding the ribosomal protein S19 (RPS19) is frequently mutated in Diamond-Blackfan anemia (DBA), a congenital erythroblastopenia. The consequence of these mutations on the onset of the disease remains obscure. Here, we show that RPS19 plays an essential role in biogenesis of the 40S small ribosomal subunit in human cells. Knockdown of RPS19 expression by siRNAs impairs 18S rRNA synthesis and formation of 40S subunits and induces apoptosis in HeLa cells. Pre-rRNA processing is altered, which leads to an arrest in the maturation of precursors to the 18S rRNA. Under these conditions, pre-40S particles are not exported to the cytoplasm and accumulate in the nucleoplasm of the cells in perinuclear dots. Consistently, we find that ribosome biogenesis and nucleolar organization is altered in skin fibroblasts from DBA patients bearing mutations in the RPS19 gene. In addition, maturation of the 18S rRNA is also perturbed in cells from a patient bearing no RPS19-related mutation. These results support the hypothesis that DBA is directly related to a defect in ribosome biogenesis and indicate that yet to be discovered DBA-related genes may be involved in the synthesis of the ribosomal subunits.
Question: In which syndrome is the RPS19 gene most frequently mutated?

Ex Output:
dba