I have a question about 'some and others'.<br/><br/>Suppose that if there is one set and we divide it into 5 groups.<br/><br/>If then I pick up one group, it is called 'Some'. And then if I do it again, the selected one is called 'others.'<br/><br/>And if I do it once more, the third one is called 'others.'<br/><br/>But I found a counterevidence that the third one is called 'Some.'<br/><br/>Which one is grammartically right? <br/><br/>THANKS IN ADVANCE