a hijacked airliner
... that in 1977, hostages on board a hijacked airliner escaped when their captors fell asleep?
... that in 1977, hostages on board <b id="mwpw"><a href="./1977_Aeroflot_Tupolev_Tu-134_hijacking" id="mwqA" rel="mw:WikiLink" title="1977 Aeroflot Tupolev Tu-134 hijacking">a hijacked airliner</a></b> escaped when their captors fell asleep?