Answer:
The sentence above is a simple sentence.
Step-by-step explanation:
A simple sentence is a sentence with just one independent clause. An independent clause is a sentence that can stand alone as a sentence because it represents a complete idea. It contains a subject and a predicate and does not depend on any other element to complete its meaning. In the sentence above, the subject is the NP "the police officer" and the predicate is the VP "ran into the house".