Update bash-extracting_from_files.md

docs/pages/bash/bash-extracting_from_files.md

@@ -148,22 +148,22 @@ The `cut` command allows to cut a line at a specific character and extract a sel
  * `-d` specify the separator  
  * `-f` specify the field to extract   
 
-!!! question "Combining with `sort` command, how can you extract the name of the top 30 most popular names and the corresponding year"
+!!! question "Combining with `sort` command, how can you extract the name of the top 50 most popular names and the corresponding year"
 
 ??? example "Click to show the solution"  
     ```bash
     # command
-    sort -n -t ';' -k4  nat2021.csv | tail -n 30 | cut -d";" -f 2,3
+    sort -n -t ';' -k4  nat2021.csv | tail -n 50 | cut -d";" -f 2,3
     ```
 
 The `uniq` command can be used to remove the redundancy. But result need to be sorted to make it work properly/
 
-!!! question "Could you now find a way to filter the redundancy"
+!!! question "Using `uniq`, could you now find a way to filter the redundancy by keeping only the names"
 
 ??? example "Click to show the solution"  
     ```bash
     # command
-    sort -n -t ';' -k4  nat2021.csv | tail -n 100 | cut -d";" -f 2 | sort | uniq
+    sort -n -t ';' -k4  nat2021.csv | tail -n 50 | cut -d";" -f 2 | sort | uniq
     ```
 
 !!! question "How many time the name JEAN has been provided in total?"