python - How combine sentences based on words

Question

I have a dataset consisting of words and tags columns. I want to add a sentence column where each word within 1 sentence is separated by a period. How to do it? Here's a snippet from my dataset :

this is the code to load my dataset :

dataset = pd.read_csv('sample_data/SINGGALANG.tsv', sep='',error_bad_lines=False, engine="python", header = None, names = ['token', 'entitas bernama'], usecols = [0,1])
print(dataset.head())

output :

i wanna make like this :

Answer 1

等待大神答复