Complex sentence: As a Silicon Valley angel investor, Brown has helped raise funding for notable startup companies including Appeo, ADISN, MOEO, and IronPort, which was acquired by Cisco Systems in 2007 for US $830 million.
Split into simpler sentences: As a Silicon Valley angel investor, Brown has helped raise funding for notable startup companies including Appeo, ADISN, MOEO, and IronPort. IronPort was acquired by Cisco Systems in 2007 for US $830 million.