an annotation of gene X to cell maturation with results_in_maturation_of CL:0000057 (fibroblast) means that the fibroblast is mature at the end of the process
bone maturation (GO:0070977) results_in_maturation_of bone (UBERON:0001474)
The relationship that links an entity with a process that results in the progression of the entity over time that is independent of changes in it's shape and results in an end point state of that entity.