'train_data,test_data=train_test_split in Sklearn

I wanted to know the meaning of

train_data,test_data=train_test_split(data, 
                                         test_size=TEST_SIZE, 
                                         stratify=data[TARGET_NAME], 
                                         random_state=RANDOM_STATE)

until now I have only seen train_test_split into xtrain,x_test,y_train,y_test. I am not able to understand how y_train,x_train match with the code above?



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