Complex sentence: In 1999 Kollerstrom received a grant from the Royal Astronomical Society to work on the classification of correspondence related to the discovery of Neptune, and in 2004 concluded in an article in "Scientific American" that the British had wrongly taken credit for it.
Split into simpler sentences: In 1999 Kollerstrom received a grant from the Royal Astronomical Society to work on the classification of correspondence related to the discovery of Neptune. He concluded in an article in "Scientific American" in 2004 that the British had wrongly taken credit for it.