The conversation between human and AI assistant.
[|Human|] Identify and classify the different types of words in the given sentence.
[|AI|] - I: Pronoun
- was: Verb (past tense of be)
- eating: Verb (present participle)
- a: Article 
- ice: Adjective 
- cream: Noun 
- cone: Noun 
- while: Conjunction
- sitting: Verb (present participle)
- on: Preposition 
- a: Article
- bench: Noun.
[|Human|] 
Identify and classify the different types of words in the given sentence.