Today, coals of potentially commercial extent and quality are forming is the peat swamps of Borneo.
(coals of potentially commercial extent and quality; are forming; ) (coals of potentially commercial extent and quality are forming; is; the peat swamps of Borneo; T:Today)
coals of potentially commercial extent and quality coals of potentially commercial extent and quality are forming
are forming is
the peat swamps of Borneo T:Today