The crime scene report mentions two witnesses.
Sorting and picking the top row
ORDER BY column DESC sorts from highest to lowest, and LIMIT 1 keeps only the first row. Together they answer "which is the biggest?" questions.
The second witness
The second witness is named Annabel and lives on Franklin Ave. Try this query too:
SELECT * FROM person
WHERE name LIKE 'Annabel%'
AND address_street_name = 'Franklin Ave';
Why filter on the street too? Run it without that line and see who else turns up.
Schema Reminder
persontable has: id, name, license_id, address_number, address_street_name, ssn