Question: When does the under 20s rugby world cup start?
Disambiguated questions and answers: question: When does the 2017 under 20s rugby world cup start?
When does the 2016 under 20s rugby world cup start?
When does the 2015 under 20s rugby world cup start?
answer: 31 May 2017
31 May
7 June
7 June 2016
2 June 2015
2 June
Natural Questions answer: 30 May (from the Wikipedia article "2018 World Rugby Under 20 Championship")