Keioobyooindewa [NP [darega [mega mienakunat]ta] gen'inga] kaimeidekinakatta nodesuka
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?