Conductor leading his orchestra.
A conductor is dressed formally in tux and tails.
Because a conductor is leading his orchestra it doesn't mean he's dressed formally in tux and tails.
exists e1 x1 x2.(n_orchestra(x2) & of(x2,x1) & n_male(x1) & ne_nam_conductor(x1) & Theme(e1,x2) & Actor(e1,x1) & v_lead(e1))
exists e1 s1 x1 x2 x3 x4.(in(e1,x2) & subset_of(x4,x2) & n_tail(x4) & subset_of(x3,x2) & n_tux(x3) & a_formally(s1) & Manner(e1,s1) & Theme(e1,x1) & v_dress(e1) & n_conductor(x1))