Using Apache Nifi to enrich raw unstructured text content with CSV - apache-nifi

Question

I'm thinking of using Nifi to split text records into individual flow files. These flow files will contain unstructured text. However, I wanted to enrich the flow files with another csv files when we see the keywords in the string. For example.
Raw text
Text
$2 to $4 billion lost annually by an estimated 1.7 million people
who would be affected by their inability to afford healthcare. And
about $1.3 billion in Medicare payments go unpaid each year.
Enrichment CSV
Keywords
Enrichment field 1
Enrichment field 2
estimated
cat 1
user 1
Medicare
cat 2
user 2
Desired output
header 1
Enrichment field 1
Enrichment field 2
$2 to $4 billion lost annually by an estimated 1.7 million people
cat 1
user 1
who would be affected by their inability to afford healthcare. And
about $1.3 billion in Medicare payments go unpaid each year.
cat 2
user 2
Thanks in advance.
Not sure if anyone have similar experience on whether if this is achievable efficiently, as both flow files and enrichment csv are potentially large. Also what are the possible nifi processes are involved to run this. I was initially exploring using route on content but because the enrichment csv is too big and we have to use a lookup module instead.