choodo san-nin-no insei-ga doyoobi-no paatii-ni ki-ta . karera-wa jitsuwa uchi-de taamu peepaa-o kaite-i-ta .
exactly three.CL.GEN grad-student.NOM Saturday.GEN party-to come.PAST they.TOP in-fact home-at term paper.ACC write.PROG.PAST
Exactly three graduate students came to the party on Saturday. In fact, they (=the other students) were writing term papers at home.