Keioo-byooin-de-wa [NP [dare-ga [me-ga mienakunat]-ta] gen'in-ga] kaimei-deki-na-katta no-desuka
Keio-hospital-at-Top [[who-N [eye-N lost-sight]-Past] cause-nom] could-not-figure-out Q
At Keio Hospital, which eye of Mr. Yamada's couldn't they figure out the cause for losing sight?