There is nobody around I could practise with.
( There ( ( is ( ( nobody around ) ( I ( could ( practise with ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (NP (NN nobody) (RP around)) (SBAR (S (NP (PRP I)) (VP (MD could) (VP (VB practise) (PP (IN with)))))))) (. .)))
There are plenty of people for me to practice with.
( There ( ( are ( ( plenty ( of ( people ( for me ) ) ) ) ( to ( practice with ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (RB plenty)) (PP (IN of) (NP (NP (NNS people)) (PP (IN for) (NP (PRP me))))) (S (VP (TO to) (VP (VB practice) (PP (IN with))))))) (. .)))