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there is a phenomenon that
it is a phenomenon
it is a common phenomenon that
there is an interesting phenomenon
what is the phenomenon called
what is the phenomenon you are explaining
what is the phenomenon being explained
explanation of the phenomenon
what is meant by phenomenon
description of a phenomenon
can you explain the phenomenon
the definition of the phenomenon
there is a phenomenon that, it is a phenomenon, it is a common phenomenon that, there is an interesting phenomenon, what is the phenomenon called, what is the phenomenon you are explaining, what is the phenomenon being explained, explanation of the phenomenon, what is meant by phenomenon, description of a phenomenon, can you explain the phenomenon, the definition of the phenomenon
