code: def _first(self, tag):
  		''' Returns the first element with required POS-tag. '''
  
  		self.getelements()
  		for element in self.elements:
  			if tag in self.pos(element):
  				return element
  		return Nonf _first(self, tag):
  		''' Returns the first element with required POS-tag. '''
  
  		self.getelements()
  		for element in self.elements:
  			if tag in self.pos(element):
  				return element
  		return None
docs: Returns the first element with required POS-tag.