Premise: On the west bank of the river set in a desert landscape is the seventh-century Coptic monastery of St. Simeon now sadly in ruins, and the Mausoleum of the Aga Khan (1877 1957), spiritual leader of the Ismaili Muslim sect.

Hypothesis: Aga Khan was the spiritual leader of the Ismaili Muslim sect, but he died in 1957.
Relation: entailment