Nerdy guy taking the bus in a busy city.
A geeky looking girl wearing a fedora is in a taxi.
A guy and a girl are different genders and a human cannot be both at the same time.  A bus and a taxi are different vehicles.
exists e1 s1 s2 x1 x2 x3 x4.(n_bus(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_take(e1) & in(x3,x4) & n_city(x4) & a_busy(s2) & Theme(s2,x4) & (x1 = x2) & n_guy(x1) & a_nerdy(s1) & Theme(s1,x1))
exists e1 e2 p1 s1 x1 x2 x3.(exists x4.(in(x1,x4) & n_taxi(x4)) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & n_fedora(x3) & (x1 = x2) & n_girl(x1) & Actor(e1,x1) & v_look(e1) & a_geeky(s1) & Theme(s1,x1))