The input is taken from a negotiation between two participants who take the role of campsite neighbors and negotiate for Food, Water, and Firewood packages, based on their individual preferences and requirements. Given an utterance and recent dialogue context containing past 3 utterances (wherever available), output Yes if the utterance contains the vouch-fair strategy, otherwise output No. vouch-fair is a selfish negotiation strategy. It is used to call out fairness for personal benefit, either when acknowledging a fair deal or when the opponent offers a deal that benefits them. This can be through an explicit call out or can be implied.

[Q]: Context: 'Hmmm, I think I really need the firewood. I brought softwoods and they burn out quickly so I don't think I'll have enough wood to keep me going through the night. I get kinda scared without the fire. What is your priority?' 'Okay, well firewood is also my top priority since it will be so cold tonight. But I would be willing to take only 1 firewood (and give you 2) as long as I got 2 foods and 2 waters ' 'Thank you for the offer on firewood. I think that sounds fair. However, I really would like at least 2 waters as well. '
Utterance: 'Hmm unfortunately I can't budge since I would be accepting less of my top priority item. It sounds fair to me though; I'd get 5 items in total but less of my top priority and you would get 4 items in total but more of your top priority'
[A]: Yes

[Q]: Context: 'I could use a little to cook with, But food is my main concern. Is it hot where you will be? ' 'Ya so I could use a lot of water! Would you be willing for me to take one food two water and two firewood? ' 'Since we will have so much food to cook we could probably use the extra firewood too,would you be ok with me taking 2 food and 1 water and 2 firewood?🙂'
Utterance: 'No I'm giving you two of your top items I think it's only fair I get more items. '
[A]: Yes

[Q]: Context: 'hi i am good how about yourself🙂' 'Pretty good. Ready for this camping trip!' 'as ready as I can be hiking with 3 teenage boys..lol how about you?'
Utterance: 'Haha, yeah I can't wait to go. I really need lots of food and a bit of firewood. What do you need?'
[A]:
No