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