x1 (text) is a clause with adverbial x2 (text) and connecting members of x3 (ordered group of text)
The first member of x3 is usually called 'complement' or 'argument'; it is what comes after the adposition x2. The second member of x3 can sometimes be called 'noun phrase of adposition'; it can e.g. be the current clause (lo brisni), x1 of it, x2 of it etc. See also brisni, sumti, sumtcita.