Asentence that contains one independent clause and one or more dependent clauses is a
simple sentence
complex sentence
compound sentence
fragment

Complex sentence.

Explanation:

Complex sentence comprises of the adjoining of two clauses where the one being independent and the other would be the dependent clause. A simple sentence comprises a single sentence while a compound sentence consists of two independent clauses and fragment is a group of words. Thus, the definition exemplifies the characteristics of complex sentences. Some examples could be as follows:

1. Before I reached the place, she had left it.

2. As soon as he realized his mistake, he ran to apologize.

the characters in string all have major secrets that they strive to avoid revealing throughout the play.