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: The 1880s saw an intense competition between the European powers for territories in Africa, a process known as the Scramble for Africa Link Information: 

The Scramble for Africa, also called the Partition of Africa or the Conquest of Africa, was the invasion, occupation, division, and colonisation of African territory by European powers during the period known to historians as the New Imperialism (between 1881 and 1914) Answer: 1881 

SOLUTION: What year did the Scramble for Africa begin?

PROBLEM: Context: the river passes through Yellowtail Dam and Afterbay Dam Link Information: The dam was authorized in 1944 and groundbreaking was in 1961;  Answer: 1961

SOLUTION: What year did construction begin on the dam that the river passes through before Afterbay Dam?

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?