I have a working AmpScript that adds the inbound message of a text response to a Data Extension:
%%[
SET @MobileSendLogDE = "MobileSendLog"
SET @MOBILE_NUMBER_FIELD_LABEL = "MobileNumber"
SET @KEYWORD_FIELD_LABEL = "Keyword"
SET @UserInput_FIELD_LABEL = "UserInput"
SET @initialKeyword = "SENDLOG"
SET @UserInput = Uppercase([MSG(0).NOUN(0)])
SET @mobileNumber = Mobile_Number
INSERTDATA(@MobileSendLogDE,@MOBILE_NUMBER_FIELD_LABEL,@mobileNumber,@KEYWORD_FIELD_LABEL,@initialKeyword,@UserInput_FIELD_LABEL,@UserInput)
]%% Ok, all set. Your input is now in a data extension.
As soon as the text response has two words separate by a space I only get the first word into the Data Extension. I couldn't find any documentation on how to process multiple nouns. I tried with (0:1) or (0,1) but non of the them seem to work. The goal is to have a full text response, e.g. word1 word2 in one column in the Data Extension.