How to diagnose copd<br>See your doctor. The best way to fight copd is to see your doctor before symptoms arise. This is because symptoms of copd often don't appear until significant lung damage has already occurred.
In the usual course of events, COPD symptoms appear and then significant lung damage occurs.
 The text says the reverse, that symptoms of COPD often don't appear until significant lung damage has already occurred. The model was confused by the reversal.
( z1 and :op ( z2 appear :ARG1 ( z3 symptom :mod ( z4 disease :name ( z5 name :op "COPD" ) ) ) ) :op ( z6 damage :ARG1 ( z7 lung ) :ARG1-of ( z8 significant ) :time ( z9 then ) ) :time ( z10 course :mod ( z11 usual ) :mod ( z12 event ) ) )