What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: There is at least one x_11 for which if x_11 sleeps, then x_11 is an artist. For all x_11, x_11 is curious or x_11 will play squash. For all x_11, if x_11 were curious, then x_11 is an artist. For all x_11, if x_11 plays squash, then x_11 is sleeping.
There is at least one x_11 for which if x_11 plays squash, then x_11 is an artist can be inferred via the existential transitivity rule.