Question: Entering text in a matrix

I have a matrix that I am using for the entries in a drop down list to select.

When I type in the following text

"FBE (CDS 1), 3 LPE (CDS 2) and 3 LPP (CDS 3) with concrete"

(including the quotation marks), I get an error "unable to delimit strings/identifiers"

What is going on?  Why is Flow not treating the entry as text, and trying to parse the contents?

ExampleMatrixText.flow.zip

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