A person in the sky connected to a fan.
A propeller keeping a man in the sky for 10 minutes.
Not all persons are a man. A person connected to a fan doesn't imply in the sky for 10 minutes.
exists e1 x1 x2 x3 x4.(n_sky(x2) & a_topic(x1) & in(x1,x2) & to(e1,x4) & n_fan(x4) & Theme(e1,x3) & v_connect(e1) & (x2 = x3) & n_person(x1))
exists e1 x1 x2 x3 x4 x5.(n_sky(x4) & a_topic(x1) & for(e1,x5) & n_minute(x5) & n_date(x5) & a_date_day_10(x5) & a_date_day_10(x5) & Theme(e1,x3) & Actor(e1,x2) & v_keep(e1) & in(x3,x4) & n_man(x3) & (x1 = x2) & n_propeller(x1))