You are given a sentence in Spanish. Your job is to translate the Spanish sentence into English.
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Question: Pero no sabemos cuan rapido debemos recortarlas.

Answer: But we don't really know how quickly we have to cut them.

Question: Esta es de un cazador de Africa central.

Answer: This is a picture of a central African hunter.

Question: Asi que comenzamos mirando como estas moleculas se ensamblan.

Answer:
So we set out by looking at how these molecules are put together.