add examples using the translations data

keywords/analysis/translations_example.py

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+import pandas as pd
+
+# read the latest dataset
+df  = pd.read_csv("https://covid19.communitydata.science/datasets/keywords/csv/latest.csv")
+
+# find translations of "coronavirus"
+coronavirus_itemids = df.loc[df.label.str.lower() == "coronavirus"]
+
+# there are actually 5 item ids. The one referring to the family of virus is Q57751738
+coronavirus_translations = df.loc[df.itemid == "http://www.wikidata.org/entity/Q57751738"]
+
+# let's only look at unique, non-aliases
+print(coronavirus_translations.loc[df.is_alt == False,['label','langcode']])