How many sound stages were used to build the train set for how to train your dra?
Quick Answer
I don't have information on how many sound stages were used to build the train set.
Explanation
The provided source discusses closed captioning and does not contain any details about production facilities, sound stages, or specific sets used in any film production. Therefore, I cannot answer the question based on the given evidence.
#sound stages#train set#film production
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