Task: Question Answering
Input (English): We carried out experiments on four Chinese NLP tasks, including Emotion Classification (EC), Named Entity Recognition (NER), Sentence Pair Matching (SPM) and Natural Language Inference (NLI). 
 Question: What benchmarks did they experiment on?
Output (English): Emotion Classification (EC) Named Entity Recognition (NER) Sentence Pair Matching (SPM) Natural Language Inference (NLI)