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.
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Question: Context: The rework added distinctive Renaissance Revival palace facades designed by Percy Nobbs, featuring terracotta, granite, bronze and Tyndall stone. Link Information: a Canadian architect who was born in Haddington, Scotland, Answer: Haddington, Scotland

Answer: When was the person who designed the palace facades in the Birks building born?


Question: Context: He moved back to his homeland and graduated first at the Annenschule Link Information: none Answer: none

Answer: In what year did Mikhail Sumarokov-Elston graduate from Annenschule?


Question: Context: St Jude's is constructed in yellow sandstone ashlar with a slate roof Link Information: Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism Answer: low-grade regional metamorphism

Answer:
What type of geological process forms the rock that is the roof of the church?