Test points containment in multiple curves

Hello,

I'm pretty new to grasshopper. I have a set of points on sidewalks (dark grey region in picture). I want to keep only the ones outside the region of the building footprint (light blue region in picture). All curves are closed. Hence I need to use the "Points in curve" component to obtain a cull pattern.

I tried to use it but no points are selected. I suspect it might be a tree structure issue.Currently the input points of the "Points in Curve" comp are in a tree structured like this:

[Polyline of sidewalk boundary; Inward offset of polyline; splitted curves]

On the other hand, the curves of the "Points in Curve" comp are in a tree just like this:

[Polyline of building footprint].

Any ideas on how to solve this? I could'n find on the forum an exhaustive guide of the "points in curve" comp.