Using Ruta, get a data present in next line of annotated keyword

How to get data below/above annotated keyword present in other line? I am able to annotate keyword but not able to get information

Sample text:

Underwriter's Name    Appraiser's Name          Appraisal Company Name
Alice Wheaton Cooper  Bruce Banner               Stark Industries

Code

TYPESYSTEM utils.PlainTextTypeSystem;
ENGINE utils.PlainTextAnnotator;

EXEC(PlainTextAnnotator, {Line});
ADDRETAINTYPE(WS);
Line{->TRIM(WS)};
REMOVERETAINTYPE(WS);
Document{->FILTERTYPE(SPECIAL)};

DECLARE UnderWriterKeyword, NameKeyword, UnderWriterNameKeyword;
DECLARE UnderWriterName(String label, String value);

CW{REGEXP("\\bUnderwriter") -> UnderWriterKeyword};
CW{REGEXP("Name")->NameKeyword};
(UnderWriterKeyword SW NameKeyword){->UnderWriterNameKeyword};
ADDRETAINTYPE(SPACE);
Line{CONTAINS(UnderWriterNameKeyword)} Line -> {
    (CW SPACE)+ {-> MARK(UnderWriterName)};
    };
REMOVERETAINTYPE(SPACE)

Expected Output :

Underwriter's Name: Alice Wheaton Cooper    
Appraiser's Name: Bruce Banner
Appraisal Company Name: Stark Industries

Please suggest if it is possible in RUTA ? If true, how to get data?

Solution

TYPESYSTEM utils.PlainTextTypeSystem;
ENGINE utils.PlainTextAnnotator;

DECLARE Header;
DECLARE ColumnDelimiter;
DECLARE Cell(INT column);

DECLARE Keyword (STRING label);
DECLARE Keyword UnderWriterNameKeyword, AppraiserNameLicenseKeyword,
AppraisalCompanyNameKeyword;

"Underwriter's Name" -> UnderWriterNameKeyword ( "label" = "UnderWriter
Name");
"Appraiser's Name/License" -> AppraiserNameLicenseKeyword ( "label" =
"Appraiser Name");
"Appraisal Company Name" -> AppraisalCompanyNameKeyword ( "label" =
"Appraisal Company Name");

DECLARE Entry(Keyword keyword);

EXEC(PlainTextAnnotator, {Line,Paragraph});

ADDRETAINTYPE(WS);
Line{->TRIM(WS)};
Paragraph{->TRIM(WS)};

SPACE[3,100]{-PARTOF(ColumnDelimiter) -> ColumnDelimiter};
Line -> {ANY+{-PARTOF(Cell),-PARTOF(ColumnDelimiter) -> Cell};};
REMOVERETAINTYPE(WS);

INT index = 0;
BLOCK(structure) Line{}{
    ASSIGN(index, 0);
    Line{STARTSWITH(Paragraph) -> Header};
    c:Cell{-> c.column = index, index = index + 1};
}

Header<-{hc:Cell{hc.column == c.column}<-{k:Keyword;};}
    # c:@Cell{-PARTOF(Header) -> e:Entry, e.keyword = k};

DECLARE Entity (STRING label, STRING value);
DECLARE Entity UnderWriterName, AppraiserNameLicense, AppraisalCompanyName;

FOREACH(entry) Entry{}{
    entry{ -> CREATE(UnderWriterName, "label" = k.label, "value" =
entry.ct)}<-{k:entry.keyword{PARTOF(UnderWriterNameKeyword)};};
    entry{ -> CREATE(AppraiserNameLicense, "label" = k.label, "value" =
entry.ct)}<-{k:entry.keyword{PARTOF(AppraiserNameLicenseKeyword)};};
    entry{ -> CREATE(AppraisalCompanyName, "label" = k.label, "value" =
entry.ct)}<-{k:entry.keyword{PARTOF(AppraisalCompanyNameKeyword)};};
}

The most important rule is the following:

Header<-{hc:Cell{hc.column == c.column}<-{k:Keyword;};}
    # c:@Cell{-PARTOF(Header) -> e:Entry, e.keyword = k};

It contains three rule element, Header,# and Cell, and works this way:

The rule starts to match with the Cell rule element because it is tagged as anchor with @.
This rule element matches on all Cell annotations that or not part of a Header annotation. It starts with the first Cell annotation that fulfills this condition and calls it "c".
The next rule element is # which matches until the next rule element is able to match.
The next rule element matches on a Header annotation if the inlined rule is able to match within the span of the Header annotation. The inlined rule matches on the Cell annotations remembered as "hc" within this span that have the same value for the feature column. The match is successful, if it contains a Keyword remembered as "k".
If these three rule elements matched successfully, then the actions are applied.
The first action creates an Entry annotation called "e" on the span of the Cell annotation.
The second action assigns the keyword to the Entry feature keyword.

As a summary, the rule creates an Entry annotation for each Cell annotation that is not part of the header and assigns the header keyword of the corresponding column in order to define the type of the entry.