4 sentences

1. 这波兰人到底是谁啊？

   zhèi Bō​lán​rén dào​dǐ shì shéi a?

   Who's this Polish guy, anyway?

   Source: OpenSubtitles

2. 你怎么知道他是波兰人？

   nǐ zěn​me zhī​dào tā shì Bō​lán​rén?

   How do you know he is Polish?

   Source: OpenSubtitles

3. 你是波兰人吗？

   nǐ shì Bō​lán​rén ma?

   Are you Polish?

   Source: OpenSubtitles

4. 他是波兰人。

   tā shì Bō​lán​rén.

   He's Polish.

   Source: OpenSubtitles