Hi @PANDEY Prashant,
Assuming that my assumptions in the comments are correct...
In my tests I created a variable User::Tokens
with the following value:
"Leading Paragraph.
Assessment Criteria some text.
Assessment Specification description text."
TOKEN(@[User::Tokens], ".", TOKENCOUNT( @[User::Tokens] ,"."))
will give you the following: "Assessment Specification description text"
TOKEN(@[User::Tokens], ".", TOKENCOUNT( @[User::Tokens] ,".") - 1)
will give you the following: " Assessment Criteria some text"
You would need to use similar expressions in the Derived Column Transformation in Data Flow Task.