<human>: Q: How many main emotions exist in Plutchik's theory?
 A: Robert Plutchik agreed with Ekman's biologically driven perspective but developed the "wheel of emotions", suggesting eight primary emotions grouped on a positive or negative basis: joy versus sadness; anger versus fear; trust versus disgust; and surprise versus anticipation.
 Does the answer correctly answer the question

OPTIONS:
- yes
- no
<bot>: yes