import re

def drop_non_relevant_text(text_list):
    '''Based on the distribution of the len in the Spanish words, 
    I decided to drop paragraphs composed mainly (over 50%) of too long words (len over 14 characters)  
    This is to remove errors in the process to read PDFs
    '''
    text_list = [x.split(' ') for x in text_list]
    relevant_sentences = []
    counter = 0
    for i in text_list:
        for j in i:
            if len(j)>14:
                counter+=1
        if counter/len(i)<0.5:
            relevant_sentences+=[i]
        counter=0
    return [' '.join(x).strip() for x in relevant_sentences]
    
def preprocess_text(text):
    text=text.strip()
    text = re.sub(' +', ' ',text)
    text = re.sub('-', '',text)
    text = re.sub('-', '',text)
    text = re.sub('\n', '',text)
    return [x for x in text.split('.') if len(x)>1]