Tej Pratap Yadav, who was expelled from RJD by his father and RJD founder Lalu Prasad Yadav, unveiled 'blackboard' as the election symbol of his newly formed party, 'Janshakti Janata Dal' on late Friday night. "We are ready to fight a long battle for the complete development of Bihar," Tej Pratap posted alongside a poster featuring the party symbol.