Question: Who was the lead vocalist of a song which reached number one on the "Billboard" Alternative Songs chart in August 2014, produced by Big Data?
Sentence (from "Big Data (band)"): Big Data is best known for its single "Dangerous", featuring Joywave, which reached number one on the "Billboard" Alternative Songs chart in August 2014, and was certified gold by the RIAA in May 2015.
Relevant evidence: Yes