(S (S (NP (BASENP (NNS Minutes)) (SBAR (IN after) (S (NP (BASENP (DT the) (NN flow)) (PP (IN of) (BASENP (JJ hot) (NN mud)))) (VP (VP (VBD was) (ADJP (JJ visible))) (PP (IN from) (BASENP (NNP Lake) (NNP Coatepeque))))))) (COMMA ,) (S (S (NP (BASENP (DT a) (JJ huge) (NN cloud)) (PP (IN of) (BASENP (NN ash)))) (VP (VBD appeared))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBD reached) (NP (BASENP (DT an) (NN altitude)) (PP (IN of) (BASENP (NN 50,000) (NNS feet))))) (COMMA ,) (S (VP (ADVP (RB then)) (VP (VBG covering) (NP (NP (BASENP (DT the) (JJ northwestern) (NN part)) (PP (IN of) (BASENP (DT the) (NN country)))) (SBAR (WHNP (WDT which)) (S (VP (VBZ contains) (NP (BASENP (DT the) (JJS largest) (NN concentration)) (PP (IN of) (NP (BASENP (NN coffee) (NNS farms)) (PRN (LRB -LRB-) (BASENP (JJ main) (NN export)) (RRB -RRB-))))))))))))))))) (PERIOD .))