A man waring a polo shirt fixes a ticket machine while persons line up at an adjoining machine.
The man is a mechanic.
The person who is fixing the machine could have any trade, not just be a mechanic
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(at(e2,x9) & n_machine(x9) & a_adjoining(s2) & Theme(s2,x9) & a_up(s1) & Manner(e2,s1) & while(e2,x7) & n_line(x7) & of(x7,x8) & n_person(x8) & Theme(e2,x5) & Actor(e2,x1) & v_fix(e2) & n_machine(x5) & of(x5,x6) & n_ticket(x6) & Theme(e1,x3) & Actor(e1,x2) & v_ware(e1) & n_shirt(x3) & of(x3,x4) & n_polo(x4) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2.((x1 = x2) & n_mechanic(x2)))