blah blah
head 
This is a bunch of text in a target block.
It includes excerpts from a book on animals,
which have tails.  So this line will cause the
output to be turned off
after the next 
five
lines,
i.e. here.
So you won't get to see this line
or this one.
tail
But you'll see this one
and
these
lines
too.
Now the output is off again, but since we're taking
about animals, which all have heads, the output is now
on again, and you see the previous and current lines,
as well as this and the next two...