Which group contains the adjective phrase in the sentence Robespierre was one of the members of the Jacobins who did not dress like a revoluntary?

A verb phrase is the verb and its dependents (objects, complements, and other modifiers), but not the subject or its dependents.

The verb phrase in the sentence is "was one of the few members of the Jacobins who did not dress like a revolutionary".

The subject is the noun "Robespierre".

Note: "who did not dress like a revolutionary" is a relative clause modifying the direct object 'one'.