import re
contents =r"""7.2.P.8.1 
 
Summary and Conclusion  
 
 
A stability study with two batches was carried out.
 
7.2.P.8.2 
 
Another summary and Conclusion  
 
 
A stability study with two batches was carried out."""
 
rx = re.compile(r'\d+(?:[.-]\w+)*\s*(\S.*)?$')
found = False
for line in contents.splitlines():
	if not found:
		m = rx.match(line)
		if m:
			if m.group(1):
				print(m.group(1))
				break
			else:
				found=True
	else:
		if not line.strip():
			pass
		else:
			print(line.strip())
			break

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