Question

is this a sentence fragment?
closed to visitors since the 1960s, the prehistoric cave paintings in lascaux, france, are between fifteen thousand and seventeen thousand years old.
yes no

Explanation:

A sentence fragment lacks a subject, a verb, or a complete thought. The given sentence has a subject ("the prehistoric cave paintings in Lascaux, France") and a verb ("are") and conveys a complete thought (stating the age of the paintings and their closure status). So it is a complete sentence, not a fragment.

Answer:

no