Question: Who is Trisong Detsen's paternal grandfather?
Sentence (from "Me Agtsom"): Me Agtsom ("Bearded Grandfather"), birth name Tridé Tsuktsen (704–755 CE) was the emperor of the Tibetan Empire and the son of Tridu Songtsen and his queen, Tsenma Toktokteng, Princess of Chim .
Relevant evidence: Yes