Dad is adjusting daughter's bike.
The dad is fixing his daughter's rollerblades.
Dad cannot be working on rollerblades and bike at same time.
exists e1 x1 x2 x3.(ne_nam_dad(x1) & Theme(e1,x3) & Actor(e1,x1) & v_adjust(e1) & n_bike(x3) & of(x3,x2) & n_daughter(x2))
exists e1 x1 x2 x3.(n_rollerblade(x3) & of(x3,x2) & n_daughter(x2) & of(x2,x1) & n_male(x1) & n_dad(x1) & Theme(e1,x3) & Actor(e1,x1) & v_fix(e1))