[tag=VBG] [lemma=the] [lemma=selector] [tag=NNS | □=□]
[tag=VBG] [lemma=the] [lemma=selector] [tag=NNS | lemma=□]
[tag=VBG] [lemma=the] [lemma=selector] [tag=NNS | tag=□]
Select threads to read as usual , by typing the selector letters , which changes the corresponding - signs to + signs .