Update README.md

README.md

@@ -31,7 +31,7 @@ A Dataset and Analysis on Short-Term Temporal Shifts, AACL main conference 2022"
 a timestamp which distributes from September 2019 to August 2021.
 - Entity Types: `corperation`, `creative_work`, `event`, `group`, `location`, `product`, `person` 
 
-***PREPROCESSING:***
+### Preprocessing
 We pre-process tweets before the annotation to normalize some artifacts, converting URLs into a special token `{{URL}}` and non-verified usernames into `{{USERNAME}}`.
 For verified usernames, we replace its display name with symbols `{@}`.
 For example, a tweet
@@ -53,7 +53,7 @@ via {{USERNAME}} link below: {{URL}}
 We ask annotators to ignore those special tokens but label the verified users' mentions.
 
 
-***DATA SPLITS:***
+### Data Split
 
 | split             | number of instances | description |
 |:------------------|------:|------:|
@@ -72,10 +72,10 @@ We ask annotators to ignore those special tokens but label the verified users' m
 | extra_2021        | 93594 | extra tweet without annotations from September 2020 to August 2021 |
 
 
-***REPRODUCE EXPERIMENTAL RESULT:*** To reproduce the experimental result on our AACL paper, please see the repository 
-[https://github.com/asahi417/tner/tree/master/examples/tweetner7_paper](https://github.com/asahi417/tner/tree/master/examples/tweetner7_paper).
-
+### Reproduce Experimental Result
 
+To reproduce the experimental result on our AACL paper, please see the repository 
+[https://github.com/asahi417/tner/tree/master/examples/tweetner7_paper](https://github.com/asahi417/tner/tree/master/examples/tweetner7_paper).
 
 ## Dataset Structure