Using Panda. For each country, find the deadliest date (measured by highest number of new deaths). Find the date with the highest new cases. By how many days those two dates are apart from each other?

continent	location	date	total_cases	new_cases	new_cases_smoothed	total_deaths	new_deaths	new_deaths_smoothed	total_cases_per_million	new_cases_per_million	new_cases_smoothed_per_million	total_deaths_per_million	new_deaths_per_million
Asia	Afghanistan	3/22/2020	34	4	2.571	1	1	0.143	0.873	0.103	0.066	0.026	0.026
Asia	Afghanistan	3/23/2020	41	7	3.286	1	0	0.143	1.053	0.18	0.084	0.026	0
Asia	Afghanistan	3/24/2020	43	2	3.286	1	0	0.143	1.105	0.051	0.084	0.026	0
Asia	Afghanistan	3/25/2020	76	33	7.429	2	1	0.286	1.952	0.848	0.191	0.051	0.026
Europe	Albania	3/11/2020	12	2		1	1		4.17	0.695		0.347	0.347
Europe	Albania	3/12/2020	23	11		1	0		7.992	3.822		0.347	0
Europe	Albania	3/13/2020	33	10		1	0		11.467	3.475		0.347	0
Europe	Albania	3/14/2020	38	5	5.429	1	0	0.143	13.205	1.737	1.886	0.347	0
Europe	Albania	3/15/2020	42	4	6	1	0	0.143	14.594	1.39	2.085	0.347	0
Africa	Algeria	3/12/2020	24	4	1.714	1	1	0.143	0.547	0.091	0.039	0.023	0.023
Africa	Algeria	3/13/2020	26	2	1.286	2	1	0.286	0.593	0.046	0.029	0.046	0.023
Africa	Algeria	3/14/2020	37	11	2.857	3	1	0.429	0.844	0.251	0.065	0.068	0.023
Africa	Algeria	3/15/2020	48	11	4.143	4	1	0.571	1.095	0.251	0.094	0.091	0.023