Improve rewriting of https://www.poetryfoundation.org/poems/44396/i-wake-and-feel-the-fell-of-dark-not-day in Via3

**Describe the bug**
https://www.poetryfoundation.org/poems/44396/i-wake-and-feel-the-fell-of-dark-not-day is a site one of our LMS users is trying to build a Hypothesis assignment from after viewing other poems from that site get used in our webinar.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to https://www.poetryfoundation.org/poems/44396/i-wake-and-feel-the-fell-of-dark-not-day
2. Go to https://via.hypothes.is/https://www.poetryfoundation.org/poems/44396/i-wake-and-feel-the-fell-of-dark-not-day
3. Compare with screenshots

**Expected behavior**
The top of the page currently causes students to have to scroll quite far to find the poem. Ideally it would not do so.

**Screenshots**
**Without** Via

**With** Via

**Desktop (please complete the following information):**
- Mac OS Mojave 10.14
- Chrome 84

**Additional context**
https://hypothesis.zendesk.com/agent/tickets/12278

Start by comparing the Poetry Foundation URL with its Via3 URL and the supplied screenshots to identify how the page is rewritten. Trace the rewriting entry point that handles this URL, then verify the result against the reproduction steps. Done means the poem is reachable near the top of the Via3 page without extensive scrolling.

Written by the indexing model from the issue text.