A: I borrowed this book from Mr. Tanaka. B: Speaking of Mr. Tanaka, I wonder if he's gotten over his illness yet.
(a).
A:次の日曜日は京都へ行くつもりだ。 B:京都と言えば、春子が京都大学の入学試験に通ったそうだ。
A: I'm going to Kyoto next Sunday. B: Speaking of Kyoto, I heard that Haruko passed Kyoto University's entrance exam.
(b).
A:小西君はよく休むね。 B:よく休むと言えば、山本君も最近見ませんね。
A: Mr. Konishi is absent frequently, isn't he? B: Talking about about (someone's) frequent absences, we don't see Mr. Yamamoto these days either, do we?