Complex sentence: SkyTeam is an airline alliance founded on 22 June 2000, with its centralised management team, "SkyTeam Central", based at the World Trade Center Schiphol Airport on the grounds of Amsterdam Airport Schiphol in Haarlemmermeer, Netherlands.
Split into simpler sentences: SkyTeam is an airline alliance founded on 22 June 2000. Its centralised management team, "SkyTeam Central", is based at the World Trade Center Schiphol Airport on the grounds of Amsterdam Airport Schiphol in Haarlemmermeer, Netherlands.