Classify this sample string for sentiment as either positive, negative, or neutral.
My teacher was helpful and kind today.
The sentiment in the sentence "My teacher was helpful and kind today" is positive.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify this sample string for sentiment as either positive, negative, or neutral.

### Input:
My teacher was helpful and kind today.

### Output:
The sentiment in the sentence "My teacher was helpful and kind today" is positive.