diff --git a/src/loader.py b/src/loader.py
index 0215a9e..9664fc7 100644
--- a/src/loader.py
+++ b/src/loader.py
@@ -26,12 +26,25 @@ def load_files(args):
             et = load_xml(fname)
             yield file_sentence_generator(et, skip_id_check, do_msd_translate, args.pc_tag)
         elif extension == ".gz":
-            yield load_gz(fname)
+            yield load_csv(fname, True)
         else:
-            raise NotImplementedError("Unknown file extension: {}".format(extension))
+            yield load_csv(fname, False)
+        # else:
+        #     raise NotImplementedError("Unknown file extension: {}".format(extension))
+
+def lines_gz(filename):
+    with gzip.open(filename, 'r') as fp:
+        for line in progress(fp, 'load-gz'):
+            yield line.decode('utf8')
 
 
-def load_gz(filename):
+def lines_csv(filename):
+    with open(filename, 'r') as fp:
+        for line in progress(fp, 'load-csv'):
+            yield line
+
+
+def load_csv(filename, compressed):
     result = []
     bad_sentence = False
 
@@ -49,27 +62,27 @@ def load_gz(filename):
             words[lfrom].add_link(ana, words[ldest])
         result.extend(words.values())
 
-    with gzip.open(filename, 'r') as fp:
-        for line in progress(fp, 'load-gz'):
-            line_str = line.decode('utf8').strip()
-            line_fixed = line_str.replace(',', '\t').replace('\t\t\t', '\t,\t')
-            line_split = line_fixed.split("\t")
+    line_gen = lines_gz if compressed else lines_csv
+    for line in line_gen(filename):
+        line_str = line.strip()
+        line_fixed = line_str.replace(',', '\t').replace('\t\t\t', '\t,\t')
+        line_split = line_fixed.split("\t")
 
-            if line_split[1] == "1" and len(words) > 0:
-                sentence_end(bad_sentence)
-                bad_sentence = False
-                links = []
-                words = {}
+        if line_split[1] == "1" and len(words) > 0:
+            sentence_end(bad_sentence)
+            bad_sentence = False
+            links = []
+            words = {}
 
-            try:
-                sid, wid, text, msd, lemma, link_src, link_type = line_split
-            except ValueError:
-                bad_sentence = True
-            full_id = "{}.{}".format(sid, wid)
-            
-            words[wid] = Word(lemma, msd, full_id, text, True)
-            if link_src != '0':
-                links.append((link_src, wid, link_type))
+        try:
+            sid, wid, text, msd, lemma, link_src, link_type = line_split
+        except ValueError:
+            bad_sentence = True
+        full_id = "{}.{}".format(sid, wid)
+        
+        words[wid] = Word(lemma, msd, full_id, text, True)
+        if link_src != '0':
+            links.append((link_src, wid, link_type))
     
     sentence_end(bad_sentence)
     return result