The Relative Clause is “who are five in number”. It is a type of dependant clause (it need the main clause in order to convey its meaning properly) that has the same function of an adjective; that is to say, it modifies a noun “friends”.
Intricate means <span>very complicated or detailed. something made up of many small parts would be intricate</span>
B. Hall knew that the outrage would help Britain's cause
