    ‘Sentence 1:H. Carl. McCall :* co-chairman of.  the: exchange 's._ special “committee: on  ‘governance’, resigned Thursday ; saying:Reed  “should startwith a-"‘clean slate .." :    Sentence 2: Reed’ artived.a. dey after H, Cart:  McCall’, co-chairman .of: the. exchangé:-’s  ‘special .committee. on .govémance :;:resigned  ‘saying Reed should have a." clean’ slate" to.  ‘take Ghariges oe    