Added dataset_a and dataset_b

dataset_a/test.csv

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+id,text,label
+6,It was a boring movie,negative
+7,Absolutely loved the story,positive
+

dataset_a/train.csv

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+id,text,label
+1,The movie was fantastic and thrilling,positive
+2,The plot was dull and uninteresting,negative
+3,The visuals were stunning,positive
+4,The characters lacked depth,negative
+5,An amazing cinematic experience,positive
+

dataset_b/test.csv

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+id,text,label
+6,The item quality was poor,negative
+7,Fast delivery and great packaging,positive
+

dataset_b/train.csv

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+id,text,label
+1,The product arrived early and works great,positive
+2,It stopped working after a week,negative
+3,Very satisfied with the purchase,positive
+4,Customer service was unhelpful,negative
+5,Excellent value for the price,positive
+