TASK DEFINITION: In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
PROBLEM: Context: due to the unpopular edict by Emperor Domitian that all colonial vines must be uprooted. When Emperor Probus, the son of a gardener, rescinded the edict Link Information: Domitian (; ; 24 October 51 – 18 September 96 AD) was Roman emperor from 81 to 96 Answer: 180

SOLUTION: How many years were between the end of the Emperor's reign who called for all colonial vines to be uprooted and the beginning of the reign where the son of a gardener rescinded the edict?

PROBLEM: Context: Modelmaker Peter Firmin and writer Oliver Postgate similarly created several stop-motion animated works for children during this period, including "Pingwings" (1961–1964), "Pogles' Wood" (1966–1967) and "Clangers" (1969–1972). Link Information: none Answer: none

SOLUTION: Which of the stop-motion animated works created by Firmin and Postgate had the most success?

PROBLEM: Context: The Derg overthrew the Ethiopian Empire and Emperor Haile Selassie in a coup d'état on 12 September 1974, Link Information: Haile Selassie I (, ; born Lij Tafari Makonnen Woldemikael; 23 July 1892 – 27 August 1975) was Crown Prince and Regent of the Ethiopian Empire from 1916 to 1928, and then King and Regent from 1928 to 1930, and finally Emperor from 1930 to 1974. Answer: 58

SOLUTION:
How many years had the Emperor Haile Selassie been in power when the Derg overthrew his rule in 1974?