<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _assemble_association(stmt):
 """Assemble Association statements into text."""

    member_strs = [_assemble_agent_str(m.concept) for m in stmt.members]
    stmt_str = member_strs[0] + ' is associated with ' + \
        _join_list(member_strs[1:])
    return _make_sentence(stmt_str)