Question: The thriller film 3 gained high anticipation due to the viral marketing of what song that was written and sung by Dhanush, and composed by Anirudh Ravichander?
Sentence (from "Maari (film)"): After being in pre-production phase since March 2014, principal photography began on 4 November 2014 and lasted till 15 March 2015.
Relevant evidence: No