Update app.py

app.py

@@ -52,12 +52,15 @@ with st.sidebar:
     st.write("Note: Earnings dates are shown for the next 3 months")
     st.write('')
     st.write('')
+    st.markdown("## [Explanatory Article](https://medium.datadriveninvestor.com/build-a-stock-earnings-calendar-of-your-favorite-stocks-in-python-36bba1950a61)")
+    st.write('')
+    st.write('')
     # Where the data came from
     st.markdown("## [Financial Modeling Prep API](https://intelligence.financialmodelingprep.com/pricing-plans?couponCode=damianboh&utm_campaign=damianboh&utm_medium=blog&utm_source=medium)\
     \n\nEarnings Dates for all tickers are obtained from the FinancialModelingPrep API, feel free to sign up\
     [here](https://intelligence.financialmodelingprep.com/pricing-plans?couponCode=damianboh&utm_campaign=damianboh&utm_medium=blog&utm_source=medium)\
     if you wish.")
-    
+   
 # Parse user input into a list
 tickers_string = tickers_string.replace(' ', '')
 tickers = tickers_string.split(',')