In what year was the album “Lojalność” released by Hemp Gru?

In what year was the album “Lojalność” released by Hemp Gru?: The album “Lojalność” was released in 2011 by Hemp Gru, featuring 10 tracks.
What is the most successful song from the album “Lojalność” by Hemp Gru?: “Zapomniani Bohaterowie” is the biggest hit from the album “Lojalność” by Hemp Gru.

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