Lost dark brown full-sized violin with 'Stradivari model' label inside f-hole lost at Lincoln Park near the community center.

I lost my beloved violin while attending a picnic at Lincoln Park near the community center last Sunday. I laid my case down to grab some food, and when I returned, it was gone. The violin is a dark brown, full-sized instrument with a few minor scratches but in good playing condition. There’s a label inside the f-hole that says 'Stradivari model.' I'm really hoping it can be returned to me as I have many memories attached to it.