Add app_reviews templates

[gchhablani]

Notes:

• I am not sure about convert_to_star_rating. Should a model be able to generate emojis? 🤔

Edit
This is from bert-base-uncased:

>>> bt('[UNK]')
{'input_ids': [101, 100, 102], 'token_type_ids': [0, 0, 0], 'attention_mask': [1, 1, 1]}
>>> bt('🤔')
{'input_ids': [101, 100, 102], 'token_type_ids': [0, 0, 0], 'attention_mask': [1, 1, 1]}

[craffel]

This prompt and the one above are ambiguous - the model won't know whether you mean for it to generate the number of stars, a certain number of emojis, etc. I think you need to give the model more instructions as to which you want.

[gchhablani]

I've updated the rating information for both cases. I've added emojis for the star-case, hope that is fine?

[craffel]

This prompt will only result in 5 unique examples - I'm not sure that's enough, I think the model would just memorize the mapping right away.

[gchhablani]

Makes sense. I will remove this template then.

[craffel]

Looking in to it, T5's vocab can't tokenize the star emoji:
https://colab.research.google.com/drive/1uXD0f2QdRdk9hMTIW9wF2S_R5tvDperz?usp=sharing
Why not just use * instead?

[craffel]

Thanks!