Aptekarsky Island
It is separated from Petrogradsky Island by the Karpovka River , from Kamenny Island and Krestovsky Island by the Malaya Nevka and from the Vyborgskaya region of St-Petersburg by the Bolshaya Nevka . 
<triplet> Karpovka River <subj> Malaya Nevka <obj> mouth of the watercourse <triplet> Malaya Nevka <subj> Karpovka River <obj> tributary <triplet> St-Petersburg <subj> Bolshaya Nevka <obj> located in or next to body of water