A construction worker observes his equipment.
The equipment is expensive.
equipment does't have to be expensive
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_observe(e1) & n_equipment(x3) & of(x3,x1) & n_male(x1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists s1 x1.(n_equipment(x1) & Theme(s1,x1) & a_expensive(s1))