Complex sentence: Another project that the princess is engaged in is "Friend in need of'PA'" or "Princess Pa Foundation" which she and her mother, Princess Soamsavali, founded in 1995 when Bangkok was flooded.
Split into simpler sentences: Another project that the princess is engaged in is "Friend in need of'PA'" or "Princess Pa Foundation". Her mother, Princess Soamsavali and the princess founded the foundation in 1995 when Bangkok was flooded.