	group	id_in_group	role	payoff	age	Gender	major	nationality	one	two	three	four	International	city	five	six	seven	eight	nine	ten	eleven	twelve	thirteen	thourteen	mail	nineb	group. id_in_subsession	group. sent_amount1	group. sent_back_amount1	group. sent_amount2	group. sent_back_amount2