def p_second(p):
    """
    simple_primary : '(' expr ')'
    simple_type : '(' type ')'
    const_expr : '(' const_expr ')'
    returning_opt : RETURNING parameter_types
    taking_opt : TAKING parameter_types
    from_opt : FROM primary
    label_decl : FUNCTION fn_name parameters set_returning_opt newlines
               | SUBROUTINE sub_name parameters newlines
               | LABEL label_name parameters newlines
    """
    p[0] = p[2]
