(Credit: Lynn Lane) The Houston Grand Opera is set to showcase the 68th world premiere in company history when it opens “Marian’s Song” on March 5 and 6, 2020 at the Cullenter of the Wortham Theater Center. The opera, which is written by Deborah D.E.E.P. Mouton and composed by Damien Sneed, is based on the life of the legendary opera {…}