Headline: How Amazon's $3.9 billion wager on primary care could change your Prime membership 
Candidate headlines:
- Factbox: Amazon's healthcare journey, from telehealth to cancer research  — same event: no
- One Medical users vow to cancel memberships over $3.9B Amazon deal  — same event: no
- Amazon buys US medical provider as it cements move into healthcare  — same event: no
- Amazon to Buy Primary-Care Firm One Medical in $3.9 Billion All-Cash Deal  — same event: yes
- Amazon acquires health provider One Medical for $3.9 billion  — same event: yes
- Amazon buys into health care market for $3.9 billion cash  — same event: yes
- WAVY.com Amazon to buy primary health care provider for $3.9B  — same event: yes