2 sentences

1. 他领衔签署了这份联合声明。

   tā lǐng​xián qiān​shǔ le zhè fèn lián​hé shēng​míng.

   He headed the list of signatories for this joint statement.

   Source: Dong Chinese Dictionary

2. 双方在会议结束后发表了一份联合声明。

   shuāng​fāng zài huì​yì jié​shù hòu fā​biǎo le yī fèn lián​hé shēng​míng.

   Both parties issued a joint statement after the meeting.

   Source: Dong Chinese Dictionary