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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def make_stmt(stmt_cls, tf_agent, target_agent, pmid):
 """Return a Statement based on its type, agents, and PMID."""

    ev = Evidence(source_api='trrust', pmid=pmid)
    return stmt_cls(deepcopy(tf_agent), deepcopy(target_agent),
                    evidence=[ev])