Creatively image a question and justification for this answer: it is not possible to tell
The question is: Given the sentence "A construction worker operates a cement mixing truck while talking on a cellphone." can we conclude that "Putting in a new sidewalk."?
Options:
- yes
- it is not possible to tell
- no
Step-by-step reasoning process: A cement mixing truck could have been building a new bridge instead of sidewalk.