instruction:
Generate a correct and concise answer for the question based on the words in the context.
question:
Context : The GCR Class 1 was a class of steam locomotives designed by John G. Robinson for the Great Central Railway, and introduced to service between December 1912 and 1913.
Question : What was the year that GCR Class 1 entered service?
answer:
December 1912

question:
Context : ISO 3166-2:VU is the entry for Vanuatu in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Question : Who set the standards for ISO 3166-2:VU?
answer:
International Organization for Standardization

question:
Context : Balamani Amma died on 29 September 2004 after having suffered from Alzheimer's disease for nearly five years.
Question : What medical condition did Balamani Amma have at the end of his life?
answer:
Alzheimer's disease