claim: The Fame, as of April of 2016, had sold 4.7 million digital copies.
evidence: SOX2 overlapping transcript -LRB- SOX2OT -RRB- is a long non-coding RNA , containing at least 5 exons .. long non-coding RNA. long non-coding RNA. exons. exons. SOX2. SOX2. The SOX2 gene , an important regulator of neurogenesis , lies within one of the introns of SOX2OT .. SOX2. SOX2. neurogenesis. neurogenesis. introns. introns. SOX2OT and SOX2DOT -LRB- an isoform of SOXOT transcribed from a distal highly conserved element -RRB- are expressed in zones of neurogenesis within the brain .. neurogenesis. neurogenesis. isoform. isoform. It is associated with central nervous system structures in zebrafish and chicken embryonic brains , and is dynamically regulated during embryogenesis .. central nervous system. central nervous system. zebrafish. zebrafish. embryogenesis. embryogenesis. SOX2OT may play a role in vertebrate development .