Determine how strongly sadness is expressed in the following tweet. Use the scale: 0: no sadness can be inferred, 1: low amount of sadness can be inferred, 2: moderate amount of sadness can be inferred, 3: high amount of sadness can be inferred.
Tweet: @CovinoandRich just heard back2back,  guess that's why they call it the blues &amp; she's got the look, but I can only sing tickle sacks version
0: no sadness can be inferred