two people are sitting at desks by the windows in a library .
Two people are in the library .
two people are sitting at desks by the windows in a library.
Two people are in the library.
Two people are sitting at desks by the windows in a library is a more descriptive way of stating that two people are in the library.
Two people are sitting at desks by the windows in a library is a more descriptive way of stating that two people are in the library .