code: import csv
  import pandas as pd
  
  one=pd.read_csv("pa_dashboards.csv")
  
  two=pd.read_csv("pa_dashboards(1).csv", squeeze=True)
  
  pattern = '|'.join(two)
  
  exist=one['sentences'].str.contains(pattern, na=False)
  
  with open('new.csv', 'w') as outFile:
      for cols in exist:
          if pattern in exist:
              outFile.write(exist, "1")
   ### importing libraries
  import matplotlib.pyplot as plt
  import numpy as np
  n = np.linspace(-5, 5, 11)
  delta = 1*(n==0)
  u = 1*(n>=0)
  plt.stem(n, delta, use_line_collection = True)
  
  # naming the x axis
  plt.xlabel('n')
  plt.ylabel('x[n] = delta[n]')
  # giving a title to my graph
  plt.title('Unit Impulse Sequence')
  plt.show()
  plt.stem(n, u, use_line_collection = True)
  plt.xlabel('n')
  plt.ylabel('x[n] = u[n]')
  # giving a title to my graph
  plt.title('Unit Step Sequence')
  # naming the y axis
  
  # naming the x axis
  # naming the y axis
  
  plt.show()
apis: pandas.read_csv
apis: matplotlib.pyplot.stem matplotlib.pyplot.title matplotlib.pyplot.show matplotlib.pyplot.ylabel numpy.linspace matplotlib.pyplot.xlabel