(32) Semantics of m-zi and WH (first version) ⟦m-zii / WHi ⟧ g = g(i) ∈ Dcf (33) A special compositional rule for EIs and RIs ⟦m-zii / WHi XP⟧ = ⟦m-zii / WHi ⟧ (⟦XP⟧ F ) For RIs, we suggest that the phonetic features of WH is acquired during derivation.
it copies whatever phonetic features of its complement at the PF component (resulting in reduplication, see §5.2 for complications in formation of RIs).