Complex sentence: This is a common method of capoing the fifth string of the banjo, since the string begins at the 5th fret thus needs to be capo'd individually since it is not covered by a capo on the other four strings.
Split into simpler sentences: This is a common method of capoing the fifth string of the banjo, since the string begins at the 5th fret. Thus, it needs to be capoed individually since it is not covered by a capo on the other four strings.