Conversion to unified causes duplication of trailing parts of MWEs

[frankier]

Example of viimeistä luokkaa in bp4 in eurosense and unified format (luokkaa is doubled!):

<sentence id="284">
<text id="fi-tok" lang="fi">Sinun ei tarvitsisi kerrata viimeistä luokkaa .</text>
<gram type="finnpos" for="fi-tok">[["sin\u00e4", {"pos": "PRONOUN", "subcat": "PERSONAL", "pers": "SG2", "num": "SG", "case": "GEN"}], ["ei", {"pos": "VERB", "subcat": "NEG", "voice": "ACT", "pers": "SG3"}], ["tarvita", {"pos": "VERB", "voice": "ACT", "mood": "COND", "neg": "CON"}], ["kerrata", {"pos": "VERB", "voice": "ACT", "inf": "A", "case": "LAT"}], ["viimeinen", {"pos": "ADJECTIVE", "num": "SG", "case": "PAR"}], ["luokka", {"pos": "NOUN", "num": "SG", "case": "PAR"}], [".", {"pos": "PUNCTUATION"}]]</gram>
<annotations>
<annotation id="13" type="stiff" support="transfer-type=unaligned&amp;transform-chain=%5B%5D&amp;transfer-from-wordnets=qwc&amp;transfer-from-source=zh-untok&amp;transfer-from-lemma-path=whole&amp;transfer-from-anchor-positions=from-id%3Dzh-untok%26char%3D0&amp;transfer-from-anchor-char-length=1" rank="1" freq="50921640" lang="fi" anchor="ei" anchor-positions="from-id=fi-tok&amp;char=6&amp;token=1&amp;token-length=1" lemma="ei" wnlemma="l=ei&amp;wn=fin,qwf,qf2" wordnets="fin qwf qf2" lemma-path="whole,omor,recurs,finnpos">not.r.01 ei.r.02</annotation>
<annotation id="51" type="stiff" rank="1" freq="27720" lang="fi" anchor="viimeistä luokkaa" anchor-positions="from-id=fi-tok&amp;char=28&amp;token=4&amp;token-length=2" lemma="viimeinen luokka" wnlemma="l=viimeinen_luokka&amp;wn=fin,qf2" wordnets="fin qf2" lemma-path="omor,recurs,finnpos omor,recurs,finnpos">graduating_class.n.01 valmistuva_luokka.n.01</annotation>
<annotation id="64" type="stiff" support="transfer-type=unaligned&amp;transform-chain=%5B%5D&amp;transfer-from-wordnets=qcn&amp;transfer-from-source=zh-untok&amp;transfer-from-lemma-path=whole&amp;transfer-from-anchor-positions=from-id%3Dzh-untok%26char%3D4&amp;transfer-from-anchor-char-length=1" rank="6" freq="55440" lang="fi" anchor="luokkaa" anchor-positions="from-id=fi-tok&amp;char=38&amp;token=5&amp;token-length=1" lemma="luokka" wnlemma="l=luokka&amp;wn=fin,qf2" wordnets="fin qf2" lemma-path="omor,recurs,finnpos">class.n.05 luokka.n.04</annotation>
</annotations>
</sentence>

</sentence><sentence id="stiff.0000133751.000.00000284">
<wf>Sinun</wf>
<instance lemma="ei" pos="ADV" id="stiff.0000133751.000.00000284.00000000">ei</instance>
<wf>tarvitsisi</wf>
<wf>kerrata</wf>
<instance lemma="viimeinen_luokka" pos="NOUN" id="stiff.0000133751.000.00000284.00000001">viimeistä luokkaa</instance>
<wf>luokkaa</wf>
<wf>.</wf>
</sentence><sentence id="stiff.0000133751.000.00000285">