A group of three individuals are working in a cluttered office setting.
They are working together in an office.
A group of three is more specific than the pronoun they. Since they are working in an office setting, presumably they work in an office.
exists e1 s1 x1 x2 x3 x4.(in(e1,x3) & n_setting(x3) & of(x3,x4) & n_office(x4) & a_cluttered(s1) & Theme(s1,x3) & Actor(e1,x1) & v_work(e1) & of(x1,x2) & n_individual(x2) & card_eq_3(x2) & n_group(x1))
exists e1 s1 x1.(in(e1,x1) & n_office(x1) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & n_thing(x1))