4 sentences

1. 这是现存最古老的建筑。

   zhè shì xiàn​cún zuì gǔ​lǎo de jiàn​zhù.

   This is the oldest building in existence.

   Source: AI Challenger 2017

2. 现存最长的家谱树有多长？

   xiàn​cún zuì cháng de jiā​pǔ shù yǒu duō cháng?

   How long is the longest existing family tree?

   Source: CCMatrix

3. 一个好问题挑战现存的答案。

   yī​ge hǎo wèn​tí tiǎo​zhàn xiàn​cún de dá'àn.

   A good question challenges existing answers.

   Source: CCMatrix

4. 这个新结构将围绕着一个现存的宫殿建造。

   zhè​ge xīn jié​gòu jiāng wéi​rào zhe yī​ge xiàn​cún de gōng​diàn jiàn​zào.

   This new structure will be built around an existing palace.

   Source: CCMatrix