Hopefully what I'm working on will make that possible, but it'll need more fields in the Nostr filter spec to enable graph queries like this.

nostr:nevent1qqs9c4pyjan6jlegvvj3d5ptjy4pazrenqu7q6y2c7y73r9hcx80m9qpz9mhxue69uhkummnw3ezuamfdejj7q3q0mtatsat7ph6rsq0w8u8npt8d86x4jfr2nqjnvld2439q6f8ugqqxpqqqqqqzluz559