Complex sentence: In 1830, Shapleigh was split in half when part of the town separated and was organized as the Town of Acton, and in 1844, a portion of the northeastern part of Shapleigh was annexed to Newfield.
Split into simpler sentences: In 1830, Shapleigh was split in half when part of the town separated and was organized as the Town of Acton. In 1844, a portion of the northeastern part of Shapleigh was annexed to Newfield.