'''
1-to-1 data merge

Merging data allows you to combine disparate datasets into a single dataset to do 
more complex analysis.

Here, you'll be using survey data that contains readings that William Dyer, Frank 
Pabodie, and Valentina Roerich took in the late 1920 and 1930 while they were on an 
expedition towards Antarctica. The dataset was taken from a sqlite database from 
the Software Carpentry SQL lesson.

Two DataFrames have been pre-loaded: site and visited. Explore them in the IPython 
Shell and take note of their structure and column names. Your task is to perform a 
1-to-1 merge of these two DataFrames using the 'name' column of site and the 
'site' column of visited.

INSTRUCTIONS
100 XP
Merge the site and visited DataFrames on the 'name' column of site and 'site' column of visited.
Print the merged DataFrame o2o.
'''
