Elk: How to obtain a particular river network with the name of the river?

Hi, I am still pretty new to grasshopper. I am using Elk and trying to isolate a particular river network, in this case, Kallang River. I have tried to use the Match Text Function, but how do I associate the true value to the curves representing the river? Would appreciate if someone could point me to the right direction. Thank you! The osm file can be downloaded at: https://ufile.io/18sim

GH ELK.gh (13.3 KB)

mapkallang.osm file is missing

Thank you for highlighting, I have uploaded the osm file!

GH ELK_001.gh (11.7 KB)

Is this what you need?

in case, just add crv on that dispatch

GH ELK_002.gh (14.4 KB)

Yes it is! Thank you so much!