In this task you are given a sentence. You must judge whether subject of the main clause is singular or plural. Label the instances as "Singular" or "Plural" based on your judgment.

Ex Input:
Still, there was a certain subtlety of expression that Earth models lacked'.

Ex Output:
Singular


Ex Input:
I can't float it up now, the turbulence up there must be terrific !'

Ex Output:
Singular


Ex Input:
At the same time, a cold thrill ran down my spine.

Ex Output:

Singular