( ( On ( the ( other hand ) ) ) ( ( if ( you ( 're ( yearning ( to ( ( ( stay aloft ) ( for ( hours ( at ( a time ) ) ) ) ) ( ( cruising along ) ( with ( ( the birds ) ( on ( ( warm currents ) ( of ( rising air ) ) ) ) ) ) ) ) ) ) ) ) ) ( then ( you ( ( 'll ( need ( to ( attend ( both ( ( ( an EP ) and ) ( a ( CP course ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (PP (IN On) (NP (DT the) (JJ other) (NN hand))) (SBAR (IN if) (S (NP (PRP you)) (VP (VBP 're) (ADJP (JJ yearning) (S (VP (TO to) (VP (VB stay) (ADVP (RB aloft)) (PP (IN for) (NP (NP (NNS hours)) (PP (IN at) (NP (DT a) (NN time))))) (S (VP (VBG cruising) (PRT (RP along)) (PP (IN with) (NP (NP (DT the) (NNS birds)) (PP (IN on) (NP (NP (JJ warm) (NNS currents)) (PP (IN of) (NP (VBG rising) (NN air)))))))))))))))) (ADVP (RB then)) (NP (PRP you)) (VP (MD 'll) (VP (VB need) (S (VP (TO to) (VP (VB attend) (NP (PDT both) (NP (DT an) (NNP EP)) (CC and) (NP (DT a) (NNP CP) (NN course)))))))) (. .)))
On the other hand if you're yearning to stay aloft for hours at a time cruising along with the birds on warm currents of rising air then you'll need to attend both an EP and a CP course.
(ROOT (S (NP (NNP Birds)) (VP (VBP need) (NP (DT a) (JJ light-weight) (NN body)) (PP (IN for)) (S (VP (TO to) (VP (VB stay) (ADVP (RB aloft)))))) (. .)))