title: UML class diagram relationship between 2 classes
body: <p>I have 2 classes called PostcodeLookup and Address. PostcodeLookp has an operation called 'Search' which returns an array of type Address. I am not sure how to represent the relation using UML.</p>
  
  <p><img src="https://i.stack.imgur.com/s6cDy.png" alt="enter image description here"></p>
  
  <p>Can somebody suggest me which relation I should use and why. I read few articles on these relations but I am always confused. Also suggest a better source to understand UML.</p>
  
  <p>Thanks in advance.</p>