( ( Oral supplements ) ( usually ( ( ( contain ( ( ( at least ) one ) ( of ( two substances ) ) ) ) ( -LRB- ( ( and ( sometimes both ) ) -RRB- ) ) ) . ) ) )
(ROOT (S (NP (JJ Oral) (NNS supplements)) (ADVP (RB usually)) (VP (VBP contain) (NP (NP (QP (IN at) (JJS least) (CD one))) (PP (IN of) (NP (CD two) (NNS substances)))) (PRN (-LRB- -LRB-) (CC and) (FRAG (ADVP (RB sometimes)) (NP (DT both))) (-RRB- -RRB-))) (. .)))
Oral supplements usually contain at least one of two substances (and sometimes both).
(ROOT (S (NP (DT All) (NNS solutions)) (VP (VBP contain) (NP (QP (IN at) (JJS least) (CD two)) (NNS substances))) (. .)))