a: excuse me, could you tell me where professor dubrovik's talk will be held?
b: i beg your pardon?
a: i didn't quite understand the announcement in the plenary session.
b: i'm sorry, but i didn't quite understand you. would you mind repeating that, please?
a: i would like to know where professor dubrovnik is.
b: ah, professor dubrovnik! he's in room 203.
a: thank you very much.
b: not at all. do you know, dr. c, i believe my english is getting worse, not better.
c: no, no, dr. b. i'm afraid i didn't understand that gentleman either.
b: well, thank goodness for that. now, where is that new interdisciplinary group meeting?
c: i think they said in the small room next to the main lecture hall.