[lemma=and] [tag=VBZ] [lemma=expel] [□] □
[lemma=and] [tag=VBZ] [lemma=expel] [□=□] □
[lemma=and] [tag=VBZ] [lemma=expel] [!□] □
An artist 's illustration depicts a quasar in the center of a galaxy that has turned on and is expelling gas at high speeds in a galactic superwind .