Complex sentence: Jón Þór Birgisson of Icelandic band, Sigur Rós, picked up the record at a record store in Reykjavík, Iceland, and asked LaValle to support their upcoming U.S. tour.
Split into simpler sentences: Jón Þór Birgisson of Icelandic band, Sigur Rós, picked up the record at a record store in Reykjavík, Iceland. This prompted them to ask LaValle to support their upcoming U.S. tour.