2 sentences

1. 有两架直升机在空中盘旋。

   yǒu liǎng jià zhí​shēng​jī zài kōng​zhōng pán​xuán.

   There were two helicopters circling around.

   Source: AI Challenger 2017

2. 保安人员报告了一个长50英尺的雪茄形白色物体在天空中盘旋。

   bǎo'ān​rén​yuán bào​gào le yī​ge cháng50 yīng​chǐ de xuě​jiā xíng bái​sè wù​tǐ zài tiān​kōng zhōng pán​xuán.

   Security guards reported a 50′ long cigar-shaped white object hovering in the sky.

   Source: CCMatrix