<qa>  What is the name of the trial that will evaluate the efficacy and safety of combination ofThis trial will evaluate the efficacy and safety of combination of pomalidomide POM and low-dose dexamethasone LD-Dex Cohort A or the combination of pomalidomide POM , daratumumab DARA and low-dose dexamethasone LD-Dex Cohort B in subjects with relapsed or refractory multiple myeloma who have received a first or second line treatment of lenalidomide-based therapy. 