{HEAD ~ An image forming apparatus} includes a first development unit, {TAIL ~ a second development unit}, and a control unit 
includes
{ HEAD ~ An image forming apparatus } includes a first development unit , { TAIL ~ a second development unit } , and a control unit
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH