What is the fine-grained topic of the following text: Former Nepalese peace and reconstruction minister and IAPP Asia Pacific Chairman EK Nath Dhakal along with Nepalese Ambassador Sewa Lamsal called on former Pakistan prime minister Yousaf Raza Gillani at his residence in Islamabad to officially extend the invitation from the government of Nepal. Only return the topic.
Invitation from the government of Nepal extended to former Pakistan prime minister by Nepalese officials.