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anion: HYDROXIDE { $$ = OH;}
| CHLORINE { $$ = Cl;}
| SULFATE { $$ = SO4;}
| CARBONATE { $$ = C03;}
%%
anion: HYDROXIDE { $$ = OH;}
| CHLORINE { $$ = Cl;}
| SULFATE { $$ = SO4;}
| CARBONATE { $$ = C03;}
%%