DC9 CREW HIT A B727 WHILE BEING PARKED.

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WE WERE CLRED TO TAXI IN TO THE COMPANY RAMP VIA RWY 9R AFTER LNDG RWY 23L. GND PERSONNEL WERE ADVISED. MARSHALLERS WERE TO TAXI US BTWN THE NOSE OF A B727 AND THE TAIL OF A CONVAIR. I WAS TAXIING THE AIRPLANE FOLLOWING THE SIGNALS FROM THE MARSHALLER CLOSELY. THERE WAS ALSO A WING WALKER ON THE L WINGTIP AND A SECOND WING WALKER ON THE R WINGTIP. WHEN WE WERE ABOUT 1/2 WAY THROUGH THE SPACE; THEY SIGNALED US TO STOP. I ENGAGED THE PARKING BRAKE AND OPENED MY CLR VIEW WINDOW TO ASSESS THE SIT. I WAS UNABLE TO DETERMINE CLRNC; AT WHICH POINT THE MARSHALLER THEN SIGNALED TO CONTINUE TO TAXI (MOVE FORWARD AND TO THE R). I BELIEVE THE MARSHALLER HAD DETERMINED THAT THERE WAS SUFFICIENT CLRNC. IT WAS DURING THIS MANEUVER THAT THE L WINGTIP MOVED OUTWARD DURING THE TURN AND SCRAPED THE NOSE OF THE B727. I RECOMMEND THE GND PERSONNEL OF ANY OP LIKE THIS NEED TO FOLLOW A RIGOROUS TRAINING PROGRAM; WHERE MARSHALLERS AND SOME OTHER GND SUPPORT COULD BE ENOUGH CONFIDENT AND PROFESSIONAL THAT CAN HANDLE A SIMPLE SIT LIKE MARSHALLING AN AIRPLANE IN TO A RAMP.