Tell me about Section 391 in Chapter 17 related to 'Dacoity.'
Section 391 defines 'dacoity' as a situation where five or more persons jointly commit or attempt to commit a robbery, or where the total number of persons jointly committing or attempting to commit a robbery, along with persons present and aiding in such commission or attempt, amounts to five or more. In such cases, every person involved in committing, attempting, or aiding is said to commit 'dacoity.'