fix

README.md

@@ -4,7 +4,7 @@ Druid is a distributed, column-oriented, real-time analytics data store that is
 commonly used to power exploratory dashboards in multi-tenant environments.
 Druid excels as a data warehousing solution for fast aggregate queries on
 petabyte sized data sets. Druid supports a variety of flexible filters, exact
-calculations, approximate algorithms, and other useful calculations Druid can
+calculations, approximate algorithms, and other useful calculations. Druid can
 load both streaming and batch data and integrates with Storm and Hadoop.
 
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