In this task, you need to count the occurrences of the given word in the given sentence.

Sentence: 'a tall plant protrudes from a glass vase'. Count the occurrences of the word 'a' in the given sentence.
2

Sentence: 'a building has people in front of it on the sidewalk'. Count the occurrences of the word 'building' in the given sentence.
1

Sentence: 'a couple wearing a suit and red scarf pose for a picture near a christmas tree'. Count the occurrences of the word 'a' in the given sentence.

4