I'm new in houdini

In learning houdini

I want export out a gbeo file

but I got 2 million points & primitive

I only want the polygons

So i want to delete polygons and select delete non select

But i can't find the function for polygons

please help

add a group SOP
name the group but leave everything else at default - this will make a group of just the primitives
add a delete SOP
put the group name in the group field
select Delete Non-Selected

HTH