Complex sentence: Christopher McKellar/Mark Grosvenor agreed to temporarily hold two parcels of Martinez Ranch adjacent to the border for the development of a cross-border terminal and in December 2005, a San Diego/Baja California Mission traveled to Mexico City and included the cross-border terminal on their agenda.
Split into simpler sentences: Christopher McKellar/Mark Grosvenor agreed to temporarily hold two parcels of Martinez Ranch adjacent to the border for the development of a cross-border terminal. In December 2005, a San Diego/Baja California Mission traveled to Mexico City and included the cross-border terminal on their agenda.