In what year was the album “DEMO_02” released by PENTAGON?

In what year was the album “DEMO_02” released by PENTAGON?: The album “DEMO_02” was released in 2017 by PENTAGON, featuring 4 tracks.
What is the most successful song from the album “DEMO_02” by PENTAGON?: “Runaway” is the biggest hit from the album “DEMO_02” by PENTAGON.

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