React SyntaxError: unknown: Unexpected token

appointments.jsx

 render: function() {
      var trNodes = this.props.data.map(function (appointment) {
        return (
          <tr><td>{appointment.id}</td><td>{appointment.scheduled_time}</td><td>{appointment.pet_id}</td><td>Delete</td></tr>
        );
      });
      var commentNodes = return (
        <div className="commentBox">trNodes</div>
      );

    return (
      <div className="commentList">
        {commentNodes}
      </div>
    );
  }
}