But what about a reference by MacNeil's partner, Jim Lehrer, to  some ten thousand black gold and diamond miners [on strike in South Africa]. 
( But ( what ( ( ( ( ( about ( a reference ) ) ( by ( ( ( ( ( MacNeil 's ) partner ) , ) ( Jim Lehrer ) ) , ) ) ) ( to ( ( some ( ten thousand ) ) ( black ( gold ( and ( diamond miners ) ) ) ) ) ) ) ( ( -LSB- ( on strike ) ) ( in ( South ( Africa -RSB- ) ) ) ) ) . ) ) )
(ROOT (S (CC But) (NP (WDT what)) (VP (ADVP (IN about) (NP (DT a) (NN reference)) (PP (IN by) (NP (NP (NP (NNP MacNeil) (POS 's)) (NN partner)) (, ,) (NP (NNP Jim) (NNP Lehrer)) (, ,))) (PP (TO to) (NP (QP (DT some) (CD ten) (CD thousand)) (JJ black) (NN gold) (CC and) (NN diamond) (NNS miners)))) (VBD -LSB-) (PP (IN on) (NP (NN strike))) (PP (IN in) (NP (NNP South) (NNP Africa) (NNP -RSB-)))) (. .)))
Jim Lehrer made reference to black gold and diamond miners on strike in South Africa.
( ( Jim Lehrer ) ( ( ( ( made reference ) ( to ( black ( gold ( and ( diamond miners ) ) ) ) ) ) ( on ( strike ( in ( South Africa ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Jim) (NNP Lehrer)) (VP (VBD made) (NP (NN reference)) (PP (TO to) (NP (JJ black) (NN gold) (CC and) (NN diamond) (NNS miners))) (PP (IN on) (NP (NP (NN strike)) (PP (IN in) (NP (NNP South) (NNP Africa)))))) (. .)))