Fix typos in README.md

Author: kcurrier

README.md

@@ -4,11 +4,11 @@ A guide to using KnowWhereGraph
 
 ## Understanding the Ontology
 
-Before you can use KnowWhereGraph's data, you must first understand part of the ontology that are relevant to you. How do you find which parts of the ontology are relevant to you? Get a crash course into the most important ontology aspects and to obtain a bird's eye view to figure out what to ask for, and how - [Here](./ontology.md).
+Before you can use KnowWhereGraph's data, you must first understand parts of the ontology that are relevant to you. How do you find which parts of the ontology are relevant to you? Get a crash course in the most important ontology aspects and obtain a bird's eye view to figure out what to ask for, and how — [Here](./ontology.md).
 
 ## Data Acquisition
 
-Obtaining data can be a difficult process - if you're using SPAQRL (which you will be), it's even more. Learn a few tips and tricks to getting the data you need from the database [Here](./sparql-download.md).
+Obtaining data can be a difficult process — if you're using SPAQRL (which you will be), it's even more so. Learn a few tips and tricks for getting the data you need from the database [Here](./sparql-download.md).
 
 ## Running your own