2 sentences

1. 他曾进过集中营，对不对？

   tā céng jìn guò jí​zhōng​yíng, duì bù duì?

   He was in a concentration camp, right?

   Source: OpenSubtitles

2. 许多无辜的人在战争期间被关进了集中营。

   xǔ​duō wú​gū de rén zài zhàn​zhēng qī​jiān bèi guān​jìn le jí​zhōng​yíng.

   Many innocent people were held in concentration camps during the war.

   Source: Dong Chinese Dictionary