Update README.md

README.md

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-The dataset consists of 5500 English sentence pairs that are scored and ranked on a relatedness scale ranging from 0 (least related) to 1 (most related).
+
+## STR-2022: Dataset Description
+
+The dataset consists of 5500 English sentence pairs that are scored and ranked on a relatedness scale ranging from 0 (least related) to 1 (most related).
+
+## Loading the Dataset
+- The sentence pairs, and associated scores, are in the file sem_text_rel_ranked.csv in the root directory. The CSV file can be read using:
+
+  ```python
+  import pandas as pd
+  
+  str = pd.read_csv('sem_text_rel_ranked.csv')
+  
+  row = str.loc[0]
+  sent1, sent2 = row['Text'].split("\n")
+  score = row['Score']
+  ```
+
+- Relevant columns: 
+
+  - Text: Sentence pair, separated by the newline character.
+  - Score: The semantic relatedness score between 0 and 1. 
+
+- Additionally:
+  - the SourceID column indicates the source dataset from which the sentence pair was drawn (see Table 2 of our paper)
+  - The SubsetID column indicates the sampling strategy used for the source dataset
+  - and the PairID is a unique identifier for each pair that also indicates its Source and Subset.