The main purpose for mentioning it here is that an ordinary compass indicates magnetic north , the direction of the magnetic North Pole.
(The main purpose for mentioning it here; is; that an ordinary compass indicates magnetic north) Context(The main purpose for mentioning it here is,List([0, 42))):(an ordinary compass; indicates; magnetic north)
The main purpose for mentioning it here is,List([0, 42))
The main purpose for mentioning it here an ordinary compass
is indicates
that an ordinary compass indicates magnetic north
magnetic north