Consider the question. Premise: "Two soccer teams are on the field."
Based on this premise, can we conclude that the hypothesis "Two soccer teams are competing in the world cup." is true?
Options:
- yes
- it is not possible to tell
- no
 What is the step-by-step reasoning process to arrive at the answer: it is not possible to tell?
Two teams on a field may not mean that they are competing for world cup.