How to use PCG sampleMesh from Static Mesh Spawner result

[odolgtt]

i want spawn some small rock , base on Static Mesh Spawner result. i wish sample mesh from the BigBaseRock result , which BigBaseRock from Static Mesh Spawner.

the final aim to Random spawn some bigBaseRock, and random spawn more small rock on the bigBaseRock.

i can’t get it, please help. thanks

[odolgtt]

like this, if want spawn grass base on rock, i must manully choose the rock staticMesh. it can’t dynamic or random