Complex sentence: Revolutionary leader and later the President Kaysone Phomvihane hid out in Tham Than Kaysone Cave from 1964, and later President Khamtay Siphandone hid out at Tham Than Khamtay Cave from 1964 and he established a base there, with meeting rooms, reception rooms and a research room.
Split into simpler sentences: Revolutionary leader and later the President Kaysone Phomvihane hid out in Tham Than Kaysone Cave from 1964, and later President Khamtay Siphandone hid at Tham Than Khamtay Cave from 1964. He established a base there, with meeting rooms, reception rooms and a research room.