I am trying to import a tab delimited file into a table containing 21 columns.

It fails on this record
Sapurv10037426m         176     RPS-BLAST(BLASTP)       cdd     gnl|CDD|239293  
72      159     1       89      33.7    56.5    174     70.7    92      
cd02995, PDI_a_PDI_a'_C, PDIa family, C-terminal TRX domain (a') subfamily; 
composed of the C-terminal redox active a' domains of PDI, ERp72, ERp57 (or 
ERp60) and EFP1. PDI, ERp72 and ERp57 are endoplasmic reticulum (ER)-resident 
eukaryotic proteins involved in oxidative protein folding. They are oxidases, 
catalyzing the formation of disulfide bonds of newly synthesized polypeptides 
in the ER. They also exhibit reductase activity in acting as isomerases to 
correct any non-native disulfide bonds, as well as chaperone activity to 
prevent protein aggregation and facilitate the folding of newly synthesized 
proteins. PDI and ERp57 have the abb'a' domain structure (where a and a' are 
redox active TRX domains while b and b' are redox inactive TRX-like domains). 
PDI also contains an acidic region (c domain) after the a' domain that is 
absent 
 in ERp57. ERp72 has an additional a domain at the N-terminus (a"aabb'a' domain 
structure). ERp57 interacts with the lectin chaperones, calnexin and 
calreticulin, and specifically promotes the oxidative folding of glycoproteins, 
while PDI shows a wider substrate specificity. ERp72 associates with several ER 
chaperones and folding factors to form complexes in the ER that bind nascent 
proteins. EFP1 is a binding partner protein of thyroid oxidase, which is 
responsible for the generation of hydrogen peroxide, a crucial substrate of 
thyroperoxidase, which functions to iodinate thyroglobulin and synthesize 
thyroid hormones.     0       null    104     1e-16


With this message
expected 21 columns of data but found 16

If I change the substring a"aabb'a' to a''aabb'a' (two consecutive 's instead 
of ") the record loads.


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