$s = "Bla (bar;) bla bla; bla bla (foo; bar); bla bla Bla bla bla; bla bla (foo; bar); bla bla Bla bla bla; bla bla (foo; bar); bla bla Bla bla (bar;foo;bar) bla; bla bla (foo; bar); bla bla Bla bla bla; bla bla (foo; bar); bla bla ";