是在哪里

where ...?

→ 是
phrase Rare #23,694
where ...? Used to ask where an action or event took place, often in the 是…的 construction.
CH: 这本书是在哪里买的?
EN: Where did you buy this book?

你们是在哪里吃的?

Where did you guys eat?

— 托尼·厄德曼 (2016)

你是在哪里认识汤姆的?

Where did you meet Tom?

你们是在哪里认识的?

Where did you two meet?

这张照片是在哪里照的?

Where was this photo taken?

— 大象 (2003)

那架钢琴是在哪里找到的?

Where was that piano found?

— 海上钢琴师 (1998)