( Basically ( , ( ( a well ) ( ( is ( ( a hole ) ( drilled ( into ( an aquifer ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Basically)) (, ,) (NP (DT a) (NN well)) (VP (VBZ is) (NP (NP (DT a) (NN hole)) (VP (VBN drilled) (PP (IN into) (NP (DT an) (NN aquifer)))))) (. .)))
Basically, a well is a hole drilled into an aquifer.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-)) (ADVP (RB well)) (VP (VBZ is) (NP (NP (DT a) (NN hole)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN dug) (CC or) (VBN drilled) (PP (IN through) (NP (NP (DT the) (NN ground)) (ADVP (RB down) (PP (TO to) (NP (DT an) (NN aquifer)))))))))))) (. .)))