The third rule is that the most productive fishing time is usually the one and a half hours either side of high and low 
(The third rule; is; that the most productive fishing time is usually the one and a half hours either side of high and low) Context(The third rule is,List([0, 17))):(the most productive fishing time; is; T:usually; the one and a half hours either side of high and low)
The third rule is,List([0, 17))
The third rule the most productive fishing time
is is
that the most productive fishing time is usually the one and a half hours either side of high and low
T:usually the one and a half hours either side of high and low