Three firemen are conversing next to a firetruck.
Three firemen are discussing what tools to use for the job.
Just because the firemen are conversing does not mean they are discussing what tools to use.
exists e1 x1 x2.(to(e1,x2) & n_firetruck(x2) & r_next(e1) & Actor(e1,x1) & v_converse(e1) & n_fireman(x1) & card_eq_3(x1))
exists x1 x4.(n_job(x4) & exists e1 p1 x2.(n_tool(x2) & Theme(e1,x2) & Actor(e1,x1) & v_discuss(e1) & Topic(x2,p1) & exists e2 x3.(for(e2,x4) & Theme(e2,x3) & Actor(e2,x2) & v_use(e2) & n_thing(x3))) & n_fireman(x1) & card_eq_3(x1))