A duck and several plastic containers floating in water.
A duck swims in a lake
Just because a duck is in the water does not mean that it is swimming. Not all water is a lake.
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & in(e1,x4) & n_water(x4) & Actor(e1,x3) & v_float(e1) & (x2 = x3) & n_container(x2) & a_plastic(s3) & Theme(s3,x2) & a_several(s2) & Theme(s2,x2) & subset_of(x1,s1) & n_duck(x1))
exists e1 x1 x2.(in(e1,x2) & n_lake(x2) & Actor(e1,x1) & v_swim(e1) & n_duck(x1))