Complex sentence: After a Jupiter gravity assist in February 2007 the craft will continue to flyby Pluto in July 2015 and one or two other Kuiper Belt objects between 2015 and 2020.
Split into simpler sentences: After a Jupiter gravity assist in February 2007 the craft has continued towards Pluto. The primary mission flyby will occur in July 2015 and then the spacecraft will be targeted toward one or more additional Kuiper Belt objects between 2015 and 2020.