Passage: In 1906, Eugène Apert, a French physician, described nine people sharing similar attributes and characteristics. Linguistically, in the term "acrocephalosyndactyly", acro is Greek for "peak", referring to the "peaked" head that is common in the syndrome; cephalo, also from Greek, is a combining form meaning "head"; syndactyly refers to webbing of fingers and toes.

Question: How many people did Eugene Apert describe in 1906?
nine