What is the final time for Wayde van Niekerk has a partecipant of 2015 World Championships in Athletics - Men's 400 metres?)
SELECT ?value WHERE { wd:Q16855376 p:P1344 ?s . ?s ps:P1344 wd:Q20798444 . ?s pq:P2781 ?value}
wayde van niekerk: Q16855376 2015 world championships in athletics – men's 400 metres: Q20798444