Question: What number album was released on 4 April 2014 in Europe by a Dutch symphonic metal band formed in 2002 by former Within Temptation keyboardist Martijn Westerholt, and Charlotte Wessels?
Sentence (from "Martijn Westerholt"): He was previously a member of symphonic metal band Within Temptation, until he was diagnosed with infectious mononucleosis shortly after the release of Within Temptation's second full-length studio album, "Mother Earth".
Relevant evidence: No