Implement Time Series Data Decomposition in Pandas

Instruction: Using a provided time series dataset in a Pandas DataFrame, demonstrate how to perform a seasonal decomposition.

Context: This question assesses the candidate's ability to handle time series data in Pandas, specifically focusing on extracting trends, seasonality, and residuals. Candidates should demonstrate proficiency in using relevant Pandas functions and possibly statsmodels for decomposition. The solution should include loading the data, setting the appropriate time index, and applying a seasonal decomposition method to extract and plot the trend, seasonal, and residual components.