hasIslandAtMouth

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: hasIslandAtMouth

Indicates that a geographic feature, typically a river, has an island located at or near its mouth where it meets a larger body of water.