{"candidateAnswer":"Several weeks of dedicated work","evidence":"[D14:11 | 12:35 am on 14 August, 2023] Dave: Yeah, the project is going great! Here's a pic of the car I'm restoring. It's pretty cool seeing it go from a beat-up mess to a real beauty.\n[D20:1 | 8:57 pm on 22 September, 2023] Dave: Hey Calvin, good to catch up again! Had a tough time with my car project. Worked on the engine of the vintage Mustang, thought I'd fixed it, but when I started it up, heard a weird noise. So disappointing after putting so much work in. Take a look at the engine!\n[D21:4 | 2:44 pm on 4 October, 2023] Dave: Wow, Calvin, that car looks great! Working on cars really helps me relax, it's therapeutic to see them come back to life. I've been working on that Ford Mustang I found in a junkyard - it was in bad shape, but I knew it had potential.","itemId":"urn:uuid:cacaff78-dd8c-56e0-908c-d0b84a796a0b","provenance":{"sourceCommitment":"sha256:e13e7a112b3f97ac987d41a47257d64a9f46898a1df52fb285143696b719bdd5","timestamp":"2026-04-02T14:22:55Z"},"question":"How long did Dave's work on the Ford Mustang take?","referenceAnswer":"nearly two months","sources":[{"digest":{"sha256":"e13e7a112b3f97ac987d41a47257d64a9f46898a1df52fb285143696b719bdd5"}}]}