Update README.md

-# Automatic extraction of gene - disease events
-## Input data sets (original corpus given by Yalbi Balderas)
+# Sentence simplification with iSimp and Daniel Gutiérrez's algorithm
+
+## Directories 
+### iSimp
 ```Shell
-\input-data-sets
+/isimp_v2
 ```
-
-## Dictionaries 
-### Original given by Yalbi Balderas
+### Temporal iSimp files with constructs
 ```Shell
-\dictionaries-original
+/iSimp_sentences
 ```
-
-## Terminological resources (dictionaries for entity recognition) 
+### Final simplified sentences
 ```Shell
-\terminologicalResources
+/algorithm_sentences
 ```
-
-## JSON dictionaries (Gene, disease, effect and GO)
+### Cleaned sentences
 ```Shell
-\dictionaries-json
+format/sanitized_sentences
 ```
-## Example sentences 
-### Example sentences with different tags (non redundant)
+### Separated sentences one per file
 ```Shell
-\example-sentences
+format/split_sentences
 ```
-## Corpus
-### Set of abstracts and full article sentence-splitted
+
+## Scripts
+### Clean sentences for iSimp
+```Shell
+Usage: ./format/regex.py <input_file_path> <output_file_path>
+./format/regex.py ./input-sentences/input-sentences.txt ./format/sanitized_sentences/input-sentences.txt
+```
+### Main shell script for sentence simplification
 ```Shell
-\corpora
+./sentence-simplification-main.sh
+Usage: ./sentence-simplification-main.sh <input_path> <output_file_path>
+./sentence-simplification/sentence-simplification-main.sh ./format/split_sentences ./algorithm_sentences/filename.txt
+<input_path> Path for cleaned and separated sentences, one per file.
+<output_file_path> Path and filename. It uses filename to create files with simplified sentences and with an index within the filename.
+Requirements: senteces must be separated one per file and they must be cleaned.
+It calls simplifier.py
 ```
-## scripts
-### Scripts used to tag and preprocess text
+### Python scritp for sentences simplification
 ```Shell
-\scripts
-```
\ No newline at end of file
+simplifier.py
+It is called by sentence-simplification-main.sh
+```