Hmm. Ok. That makes sense. The problem topic is called “Speed and Other Rates” so it made me think that : was referring to ratios (because rate).
Tree what you can of it. Figure out what doesn’t have a parent within that part, so it must connect to the other part or be the overall root. Label parts of speech. Make sure your parent/child connections follow grammar rules based on parts of speech.
yeah that’s fine
Which of these is “by glancing up at a public tower” talking about (you can pick more than one):
- It was the calendar
- the mayor of New York had erected last year
- on the top of a building
- citizens might tell the day of the month
- they told the hours of the day
- some specific sub-parts of any of the above
What else might it be? Write out your list of possibilities you’re considering. And, when in doubt, label the parts of speech of some words around it and check what follows grammar rules (regarding what parent and children different parts of speech can have) in relation to nearby nodes.