An assisted living facility is a community for seniors who cannot live independently. One of the reasons that assisted living centers are appealing to many people is that they offer a relatively high level of independence.
A line segment is a piece, or part, of a line in geometry. A line segment is represented by end points on each end of the line segment. A line in geometry is represented by a line with arrows at each end.
Sentence segmentation is the problem of dividing a string of written language into its component sentences. In English and some other languages, using punctuation, particularly the full stop character is a reasonable approximation.