Relative clauses are formed much like normal sentences. You only leave out the topic, as that is the word preceeding it, and end with an "end relative clause"-conjunction, that I have yet to come up with.
, p V C1 C2...Cn c,
It will be surrounded by commas, and (if I haven't been clear enough on that) it follows the noun it modifies. This is the only way to describe nouns, but it is a very versatile and potentially simple way, as I intend to have a zero copula.