Three people swimming in the water and one person on the sand is running into the water.
four people are enjoying a day at the lake
People can swim or be  running into the water without being at a lake.    People can be swimming or running into the water without enjoying it.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_water(x4) & n_water(x4) & n_sand(x6) & into(e2,x4) & Actor(e2,x1) & v_run(e2) & subset_of(x5,x1) & on(x5,x6) & n_person(x5) & card_eq_1(x5) & subset_of(x2,x1) & in(e1,x4) & Actor(e1,x3) & v_swim(e1) & (x2 = x3) & n_people(x2) & card_eq_3(x2))
exists e1 x1 x2 x3.(n_lake(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_day(x2) & n_people(x1) & card_eq_4(x1))