_:AtblbovC1542 "9700653". _:AtblbovC1542 . _:AtblbovC1543 "Mapatumumab". _:AtblbovC1543 . . . . . "Source: Freebase - The World's database". "Mapatumumab"@en. . _:AtblbovC1542. _:AtblbovC1544. _:AtblbovC1543. . . . . . . _:AtblbovC1544 "mapatumumab". _:AtblbovC1544 .