You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.

Context : The 1972 Thandwe crash occurred on 16 August 1972 near Thandwe, Burma. 
Subject : 1972 Thandwe crash 
Relation : point in time
On what date did 1972 Thandwe crash occur?

Context : She was next seen in Yogi, opposite director-turned-actor Ameer Sultan, Madhumitha's role was unanimously praised with a reviewer from Rediff.com citing that ``Madhumitha, taking on a role even experienced actresses might balk at and coming out trumps'' Her performance as a young mother living in the Chennai slums, was critically praised, winning her a nomination for the Best Supporting Actress Award at the 3rd Vijay Awards. 
Subject : Madhumitha 
Relation : sex or gender
What was the gender of Madhumitha?

Context : After Bitcoin and Ethereum, Litecoin is the third-largest true cryptocurrency by market capitalization. 
Subject : Litecoin 
Relation : based on

Which is the basis of Litecoin?