Power Query searching for text between 2 columns

Hi all,

2 part question, hopefully pretty simple.  I have 2 tables, I'm trying to search a column in 1 table for values in a column on a second table.  I want it to return the matched value when one is found, but only return the first hit on my list.

I'm searching Table 1 field [Description] for values in a column called [Tag] from a table called Symptom.

=let myvalue=[Description]
in
Text.Combine(
    Table.SelectRows(Symptom,
each Text.Contains(myvalue,[Tag]))[Tag]
,
",")

This code lists all hits with a comma separation, but I can't work out how to change it so it only returns the first hit.

For bonus appriciations my next step is to return the value in the second column of the Symptom table.... 

Table is simple 2 columns:

Tag             Output

Red             It's red

If I was searching a decription field value of "Is it red".  It would look for the value 'Red' from the tag field and return 'it's red' from the output field.  If that part can't be done easily I can do a lookup in DAX if I can get the first part right.

Many thanks