Task: Question Generation
Input (English): Context : China Southwest Airlines Flight 4146 was an Ilyushin Il-18 that crashed near Chongqing, China on 18 January 1988 with the loss of all 108 passengers and crew. 
Subject : China Southwest Airlines Flight 4146 
Relation : point in time
Output (English): The date of China Southwest Airlines Flight 4146 was what?