Although, in this case the equipment did not have to be erected adjacent to an operating boiler, the erection included demolishing and erecting a complete boiler island and demolishing the existing electrostatic precipitator.
( ( ( Although , ) ( ( in ( this case ) ) ( ( the equipment ) ( ( did not ) ( have ( to ( be ( erected ( adjacent ( to ( an ( operating boiler ) ) ) ) ) ) ) ) ) ) ) ) ( , ( ( the erection ) ( ( included ( ( ( ( ( demolishing and ) erecting ) ( a ( complete ( boiler island ) ) ) ) and ) ( demolishing ( the ( existing ( electrostatic precipitator ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (, ,) (S (PP (IN in) (NP (DT this) (NN case))) (NP (DT the) (NN equipment)) (VP (VBD did) (RB not) (VP (VB have) (S (VP (TO to) (VP (VB be) (ADJP (RB erected) (JJ adjacent) (PP (TO to) (NP (DT an) (VBG operating) (NN boiler))))))))))) (, ,) (NP (DT the) (NN erection)) (VP (VBD included) (S (VP (VP (VBG demolishing) (CC and) (VBG erecting) (NP (DT a) (JJ complete) (NN boiler) (NN island))) (CC and) (VP (VBG demolishing) (NP (DT the) (JJ existing) (JJ electrostatic) (NN precipitator)))))) (. .)))
Although it was unnecessary, some of the equipment was adjacent.
( ( Although ( it ( was unnecessary ) ) ) ( , ( ( some ( of ( the equipment ) ) ) ( ( was adjacent ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (PRP it)) (VP (VBD was) (ADJP (JJ unnecessary))))) (, ,) (NP (NP (DT some)) (PP (IN of) (NP (DT the) (NN equipment)))) (VP (VBD was) (ADJP (JJ adjacent))) (. .)))